Im 17 and i've been having stomache pains like someone is kicking my stomache from inside and out as hard as they can over and over, ive been getting massive headaches about ever hour or so and tylenol doesn't help, i get low and middle back aches and feel nauses most of the time the last time i ate was yesterday morning and when i see food most the time i feel like im going to be sick ive been having these feelings for 3 weeks and i dont know what it could be im on the depo shot and i dont have periods at all ive only had 2 of the birth control shots me and my boyfriend do not use condoms and he does cum inside me for the past 8 months we never used condoms i was on the pill and they wasnt helping my periods and so i got off of the pill and i didnt get pregnant anyways so what could be the problem?