I'm anxious. I know my relatives won't get physically violen

I'm anxious. I know my relatives won't get physically violent when they fight, but my brother- before his suicide in 2008- would hit my mom a lot and I just get so nervous when I hear people yell. I think I need to get a PTSD diagnosis (not just because of past witnessed abuse) but I don't know if it's really post traumatic stress or just anxiety..

1 Heart

Following exposure to a trauma most people experience stress reactions. Understand that recovering from the trauma is a process and takes time. Knowing this will help you feel more in control.
Having an ongoing response to the trauma is normal.
Recovery is an ongoing, daily process. It happens little by little. It is not a matter of being cured all of a sudden.
Healing doesn't mean forgetting traumatic events. It doesn't mean you will have no pain or bad feelings when thinking about them.
Healing may mean fewer symptoms and symptoms that bother you less.
Healing means more confidence that you will be able to cope with your memories and symptoms. You will be better able to manage your feelings.
Positive coping actions

Certain actions can help to reduce your distressing symptoms and make things better. Plus, these actions can result in changes that last into the future. Here are some positive coping methods:
Learn about trauma and PTSD

It is useful for trauma survivors to learn more about common reactions to trauma and about PTSD. Find out what is normal. Find out what the signs are that you may need assistance from others. When you learn that the symptoms of PTSD are common, you realize that you are not alone, weak, or crazy. It helps to know your problems are shared by hundreds of thousands of others. When you seek treatment and begin to understand your response to trauma, you will be better able to cope with the symptoms of PTSD.
Talk to others for support

When survivors talk about their problems with others, something helpful often results. It is important not to isolate yourself. Instead make efforts to be with others. Of course, you must choose your support people with care. You must also ask them clearly for what you need. With support from others, you may feel less alone and more understood. You may also get concrete help with a problem you have.
Practice relaxation methods

Try some different ways to relax, including:
Muscle relaxation exercises
Breathing exercises
Meditation
Swimming, stretching, yoga
Prayer
Listening to quiet music
Spending time in nature
While relaxation techniques can be helpful, in a few people they can sometimes increase distress at first. This can happen when you focus attention on disturbing physical sensations and you reduce contact with the outside world. Most often, continuing with relaxation in small amounts that you can handle will help reduce negative reactions. You may want to try mixing relaxation in with music, walking, or other activities.
Distract yourself with positive activities

Pleasant recreational or work activities help distract a person from his or her memories and reactions. For example, art has been a way for many trauma survivors to express their feelings in a positive, creative way. Pleasant activities can improve your mood, limit the harm caused by PTSD, and help you rebuild your life.
Talking to your doctor or a counselor about trauma and PTSD

Part of taking care of yourself means using the helping resources around you. If efforts at coping don't seem to work, you may become fearful or depressed. If your PTSD symptoms don't begin to go away or get worse over time, it is important to reach out and call a counselor who can help turn things around. Your family doctor can also refer you to a specialist who can treat PTSD. Talk to your doctor about your trauma and your PTSD symptoms. That way, he or she can take care of your health better.
Many with PTSD have found treatment with medicines to be helpful for some symptoms. By taking medicines, some survivors of trauma are able to improve their sleep, anxiety, irritability, and anger. It can also reduce urges to drink or use drugs.
Coping with the symptoms of PTSD

Here are some direct ways to cope with these specific PTSD symptoms:
Unwanted distressing memories, images, or thoughts

Remind yourself that they are just that, memories.
Remind yourself that it's natural to have some memories of the trauma(s).
Talk about them to someone you trust.
Remember that, although reminders of trauma can feel overwhelming, they often lessen with time.
Sudden feelings of anxiety or panic

Traumatic stress reactions often include feeling your heart pounding and feeling lightheaded or spacey. This is usually caused by rapid breathing. If this happens, remember that:
These reactions are not dangerous. If you had them while exercising, they most likely would not worry you.
These feelings often come with scary thoughts that are not true. For example, you may think, "I'm going to die," "I'm having a heart attack," or "I will lose control." It is the scary thoughts that make these reactions so upsetting.
Slowing down your breathing may help.
The sensations will pass soon and then you can go on with what you were doing.
Each time you respond in these positive ways to your anxiety or panic, you will be working toward making it happen less often. Practice will make it easier to cope.
Feeling like the trauma is happening again (flashbacks)

Keep your eyes open. Look around you and notice where you are.
Talk to yourself. Remind yourself where you are, what year you're in, and that you are safe. The trauma happened in the past, and you are in the present.
Get up and move around. Have a drink of water and wash your hands.
Call someone you trust and tell them what is happening.
Remind yourself that this is a common response after trauma.
Tell your counselor or doctor about the flashback(s).
Dreams and nightmares related to the trauma

If you wake up from a nightmare in a panic, remind yourself that you are reacting to a dream. Having the dream is why you are in a panic, not because there is real danger now.

I too get very nervous when people are arguing.I live in the city so naturally people act out a lot more in the general public. I always get so afraid of being in the middle of a physical altercation or worse if someone pulls a gun/ other weapon.

1 Heart