Odd symptoms after Getting off Depo Provera

Patient: I have been on the depo shot since june 2010 and my last shot was sept 1,11. I didnt go back to get my last shot because i wanted to give my boy a break for a little bit plus i had gained weight on the shot. I have been having unprotected sex since. Within the past 2 weeks or so i have been having some crazy things going on with my body. in my lower abdomen between my hip bones has started to be come hard and tight. My breast are sore and veiny (little purple and big blue) and sore nipples as well. I have gained about 5 lbs since I got off the shot and my diet and excersize has not changed. around 8pm i get dizzy spells every 3-4 days. Ive never had dizzy spells before. I didnt have a period while on the shot, and havent gotten one since being off the shot. When I was pregnant with my second child it took about 3 months before the test showed positive. Any suggestions on the situations?