I'm 18 years old, and though i have been sexually active, it was in the begining of February, and I've taken 3 home pregnancy test in the last month, all came out negative. Yet my stomach gets big. There's ppl looking at it now, wondering if i am pregnant. Actually Asking me and everything. I have never been skinny, always on the heavy side, but now, weight still the same, my stomach gets bigger. Not the lower abdimen, but my actual stomach. I just thought since i started working at Whataburger a month ago, maybe i should just lay off the food. But i've been laying off the food period becuase my appitite has gone down. I am one who usually Loves food, but i cant even finish a single full meal anymore, for the past week or two. I'm full, yet i feel empty, does that make sense?
A few nights ago, i had this Real bad side ache after work, i mean REAL bad. I was driving home, and i had to pull over because i wasnt able to sit up right. It was about my waist or so. I've been having real bad back aches every now and then too, mostly at work, and i just put it off as lifting boxes wrong or something. Then yesterday, i had there real bad cramps, and its like 2 weeks away from when i should be having my period. I have a normal, 27 day cycle, nothing weird or anything.
When i was 14, i had an ovarian cyst, where they had to take out the right side of my ovary out. Maybe its just after affects from that????

Honestly, i dont know what to do, and i dont have insurance, or i'd go to the doctor. Should i go anyways?? Or am i just paranoid and crazy??