Welcome Jaci. Sorry to see you on this tread, but you're in the right place for help and support.
I can't remember much about my 3 M/C. It's a part of my life that I really don't want to go through again. But I've been told that a lot of women are actually at their most fertile after a M/C. But since you've been trying for a bit with BFN's, maybe you'd want to wait until after AF finished? Or go ask for a blood test. That way you'll get a definite + or - result. And i'd honestly go get a second opinion if your doc isn't being very helpful. Going through something like this, you need a good doc. I hope your stay here isn't a long one and you get some good answers very soon.
Sorry for your loss Candy. We are all here to support and help you whenever you need it. Hope you lay and egg soon and end up with some good news to take your sadness away.