Hello, I've missed my periods for about 3 months now. NO CHANCE (100% positive) of me being pregnant since I'm a virgin. I'm 18 years old not sexually active Except with one female(im Bi). Besides that no male as touch me in over a year. I've had irregular periods when i was younger but I only missed usually just a month. Its never been 3. Besides that nothing has really been wrong with me until last night. It started with some light cramps. (i though perhaps i was about to come on my period but i didnt) about 20mins later I started to feel back pain. (on a scale from 1-10 I'd say it was about a 6 or 7.) and my upper stomach started to hurt, no longer felt like cramps. My stomach i'd say was about an 8. I tossed and turned until about 4:30am until i finally fell asleep. I took pain pills when my back started to hurt but they didnt help at all. By the time I woke up this morning (about 10am) My back no longer hurted but my stomach did and i feel exhausted like im out of energy. Not sleepy.