I just had my first baby, he is seven weeks old. I still haven't had my period and I am worried that I might be pregnant again, we didnt wait the whole six weeks before we started having sex again, I had stopped bleeding and the stitches where gone so we didnt see the harm in it, except that we didnt use protection. I am not breastfeeding, so I cant blame my lack of a period on that. Should I be worried?