I had 5 injections of depo provera, after that I took pills for 3 months. It has been 4 months since I stop taking pills, and started having unprotected sex. I have being having regular periods since then. No luck yet, how long do I need to wait to consider to go to the Doctor and see if I'm having problems? Right now, I'm scared because using depo provera before, and not getting pregnant because of this :(