So I had a miscarriage 3 weeks ago, and I have had a lot of unprotected sex. Tonight I took a blue dye HPT, and it is positive, and very light. I got my HCG levels pulled until they were 0 so I know it wouldnt be a leftover from the previous pregnancy. But I have heard how unreliable blue dye tests are. Anyone get pregnant less than a few weeks after their miscarriage?