I had a really late BFP (17 DPO) and my HCG was only 20 when measured at 22 DPO. I had BFNs all the way up to 15 DPO. My doc believes I've miscarried (I had some heavy spotting) or will miscarry. I think it's still on its way, as the spotting I had was relatively light in comparison to my crazy heavy post-DD periods. If you had low HCG, how long did it take to naturally miscarry? How long did you keep getting positive pregnancy tests?
I go back for another level on Tuesday, but I think my doc is just doing it to confirm. There's not really much hope here. I just don't know what to expect.