Okay, so first of all

I just want to say that I do know what you are going through, I have been there, and it is hard. I think on the "bad" days it is hardest. Now, saying that I do not feel bitter anymore about not being pg because I am so excited about adopting. I am not saying that you don't have a right to be sad, but I am getting a lot of emotion through your post of pain. I am wondering if you ever took time trying to work through your emotions before adopting. IMO it is hard to hear about pregnancies, but it is just typical that people would have so much joy and emphasis on it! I am so sorry you are feeling this way, but sometimes you have to be the bigger and better person and just let it slide or you can tend to make people uncomfortable and kind of "shut yourself out" from the rest of them. It would be great if while we are working through our pain we didn't hear about anything to do with babies or pregnancy, but in reality it is not this way......
I am again sorry you are going through this, I remember when i was trying to concieve being so sad when people were pg, even just seeing one in the store. I will say that I took about four-five months to work through my feelings (actually forced to by dh) before we pursued adoption and it has made ALL the difference. Even though there might be a pang once in a while, I now WANT to hear about it all!! I would recomend counseling as well, I know thinking back, I wish I would've taken advantage of it, it might not have taken so much time to heal!! Good luck!!
Natalie