Hi, I'm 20. I'm very active but not much since May. I was on depo provera for 3 yrs but been off for 6 mos now. I didnt have a period when I was on it. I've currently went from 127 IBS to 114 Ibs in the last 3 mos. I dont have room for weight loss. I also have been on my period for a month now, switching back and forth from kinda heavy to light. I had some pelvic pain on Thurs. on a scale from 1-10 about a 6 in my lower right part of my stomach. I occasionally get nausea and weak. I've had an ovarian cyst in the past. I was in the hospital but that was prior to my birth control. I'm not sure what the problem is or what to do?