I have a question. I am suppose to start my period tomorrow & I went to the bathroom & had a test left over from last month. I went ahead & took it but didn't think much, bc my & my husband only got to try one time out of my fertile window bc we had a family emergency, anyways to my surprise it was positive!! We have been trying for seven months & had a miscarriage. my question is how early can test at home detect HCG levels & how far along am I? (rough estimate)