Baby- Over and Pray are right. It's not your fault, and there are things that maybe you can do for next time. I just started the baby aspirin during this cycle, so I'm almost hoping I don't get a BFP until next time. I don't think I've been taking it long enough for it to work.
Also, I think I read in another post you are in your 30s? I'm 35, and my OB said that if I had a 2nd m/c they would start testing on me instead of waiting until 3 m/c's. I pray that I don't have to go through another one but I feel better knowing they will take age into consideration and run tests earlier if needed. My OB also wants me to start on progesterone soon as I get my next HPT positive so maybe they can do that for you. But you're a nurse, you probably already know about progesterone. Maybe you can get an appt with the OB since the nurses weren't much help and he can give you some answers?
And, please do not blame yourself!!! I know it's hard to think that you wouldn't have to deal with the emotions if you wouldn't have tested early but deep down you knew (as well as many of us that have followed you) that you were pregnant 
. I have been debating about whether or not to test early next time too for the exact same reason, and think that if I have similar symtoms as last, I will because if I do experience another chemical, I want to be able to tell my docotor as I would feel strongly that there is an issue (maybe such as progesterone). So again, I know it's easier said than done but none of this is your fault! I will be thinking positive thoughts for you until you get clear answers and into future cycles if needed.
