I've noticed there are quite a few of us who have recently gone through, or are currently going through a miscarriage/chem preg. For those of us who have, I'm sure we've all done our fair share of research on it. I just found these websites that I'd like to share. They at least made me feel a little better.
I was doing a bit more research and came across this website. It's a bit more technical in nature, and at the end you can tell they are trying to promote their treatment center, but over all I think it goes into a bit more detail than some of the other sites out there.
I also found this one to be helpful - it has info regarding HCG levels in early pregnancy.