Every time my Mom or older brother raises their voice, even

Every time my Mom or older brother raises their voice, even if it's NOT directed at me at all... my muscles tense up, I pretty much FREEZE, my hands start to tremble... I cant help the tears that stream down my cheeks...
In my mind, the flashbacks come flooding in. EVERYTHING just... comes back. Before, it would never phase me and I'd think nothing of it. But, up until last Wednesday, I've had trouble sleeping at night. I just... feel like my older brother is just... looming over me in bed. I feel like I see him when he's not there. I feel like I'm losing my mind.

Hang in there! What your talking about is all trauma related and NORMAL. The feelings your having are common among people who have gone through traumatic events. I have had some of the same issues. You are not alone.