Feeling lost

I'm new to support groups. I have never done this before, but I feel like I need to express my hurt and anger and maybe find someone to validate my feelings. I have had 3 miscarriages. Two were back in march and November of 2007, I was 16 weeks the first one, 14 weeks the second one. The last one happened last month and I was 15 weeks. I do have two daughters that I am very grateful for, but I feel the void of the miscarriages, especially this last one. I thought for sure this pregnancy would last and my baby would make it. I still feel like I should be pregnant. I'm back into my routines, being a mom again (I'm super sick in all my pregnancies), but I hate it. I want my tummy to be getting bigger, I would be finding out the sex of my baby in a few weeks. It just sucks. I'm always crying, feeling depressed and I can't get out of this funk. I'm angry too. The other day I had a "friend" who is pregnant complain to me about already gaining 17 pounds and she's only 12 weeks. What I wouldn't give to be able to be 17 or more pounds heavier just to have my baby still with me! What kind of person complains anyway to someone who just lost her baby. Needless to say I cut her out of my life. That's how hurt and angry I am.
I also hate people telling me to be grateful I have my daughters. I'm so grateful for them, but I still have this void for my lost babies.
I try to be positive and put a smile on my face, but I cry myself to sleep every night. I don't know why this miscarriage has been harder on me, but I can't seem to get over it.
I don't know if others feel this way too, but thanks for reading and letting me express how I truly feel.

I am so sorry for your losses :( One thing I have learned through this is that people are incredibly insensitive. At my follow up appointment last week, my doctor actually said "now don't get pregnant before your appointment to get the Implanon." I wanted to punch her in the face! What kind of good OB says that?!
I'm sorry you're dealing with insensitivity. I hope you can find comfort talking to people who share the same grief.