Suffering a second loss.

I had a miscarriage 2 years ago, just you d out today the same way. I'm having a d&c tomorrow. But my doctor says that it has something to do with either me or my boyfriend. Miscarriage doesn't run in either of our families. I was so confident and so excited. And I feel bad because I am getting mad at my closest friends for the things that they say even though they mean well, for example. It just wasn't ment to be. Or it happened for a reason. It really hurts to look down and see my belly, because I'm already so big. Is anyone else having these problems? If you had issues that cause miscarriages, what might they be? They literally took 20 tubes of blood from me today for testing. Its just so hard to cope with. I don't know how I can go through this again.