I got a very faint positive at 12dpo on two different tests. At 13dpo I had fainter lines. At 14dpo I had the strongest line I had seen but then I started bleeding. Very, very heavy bleeding with some clots. I assumed that it must have been a chemical pregnancy based on so many positives and then the heavy bleeding. But the heavy bleeding has only lasted 36 hours and now it seems to have almost stopped completely. Is this normal for a chemical pregnancy? My periods are usually about 5 days long.