I hadn't gotten my period in two months. I started the Implanon (implanted birth control) when I wasn't getting my period. No I was not pregnant. Now all of a sudden, I lost weight (yes, I'm considered obese), and I got my period and it's been over a week. Technically wed was a week... so I need help... I'm only bleeding when I wipe. And when my boyfriend and I have sex, I can't feel anything because of bleeding... What could cause this?