I am trying to conceive again but my period will not go away. Its been on for 3 weeks it went off for one day then came back on the next day after i had sexual intercourse. And i did miscarried 3 months ago. Before that my period was so normal it last anywhere from 26-29 days. Now it is all messed up and it only lasted like 3-5 days long. So what she I do to get my regular periods back so i can conceive?