Agreed, if you got a real period after having sex, it sounds extremely unlikely you could be pregnant. Why the test said you were surprises me, because I've heard we take such a small amount of HCG, it doesn't/wouldn't show up on a test. Maybe a false positive? But I have to agree with sweetiepie, my cycle gets screwy whenever I go on HCG and there is noooo possible way I could be pregnant (sadly). For example, the past couple of days I've had cramps as if I'm going to get my period and it isn't due for two weeks. Some women get sore breasts. According to my clinic workbook, this is totally normal - but still so annoying! ~ Lucy