I had my period on dec 30- jan 3rd. my bf and i had sex on the 10th. i have had two what seems to be periods... i have been bleeding for 5 days. heavy at first then it goes very light. my first period after sex was jan 30- feb 4th and then feb 26 & i'm st

Slightly irregular: It sounds like your periods have been only slightly irregular, and I am not sure if this is usual for you or not; however, a little menstrual irregularity is not usually a reason for concern. Your cycle Dec-Jan was 31 days, and in Jan-Feb only 22 days; but both of these are within normal. Pregnancy is not likely; if you had unprotected sex, get checked for sexually transmitted diseases.