Confused

Last cycle was 11/16. AF was due 12/14. Had unprotected sex everyday after af last month but didn't keep up with ovulation. 12/17 experienced pink bleeding as I wiped figure af would show but still nothing. Bleeding only lasted about an hour. And took pregnancy test and got positive but line was very faint. Today 12/20 I think I've started light period not for sure. Have anyone experience something like this? HELP