3 Surgeries For Ovarian Cysts, Got Gonapeptyl Injection To Stop Ovulation. No Periods, Dizzy, Nauseous. What's This ?

good day. I had three surgeries remove ovarian cysts . The last one being end of July 2012. For august September and October I got gonapeptyl injection to stop ovulation . The last one being on 9 October 2012. I have not gotten my period yet and lately I have been feeling nauseous, a bit dizzy once in a while. I am constantly hungry waking up in middle of night to eat. What could this be?I was diagnosed with stage 4 endometriosis