Do I have an ovarian cyst? Please help!

I am 17F, 230 lbs, never had sex or used bc, diagnosed with anxiety and ptsd, went to the doctor a week ago and I have a pinched nerve in upper back. No other known medical conditions. Pretty normal periods I guess, every 20-22 days. I woke up this morning, didn't really eat anything today but candied popcorn that my friend wanted me to try and later on in the day I ate some Ritz crackers, I dont really have much if an appetite at the moment.....I have pain in the lower left part of my stomach, at first I thought it was gas, ibs or constipation but I had a bm today and the pain went away but came back. I feel it more when im sitting or hunched over. It's been like this all day, it'll come back then leave a few hours/minutes later. I am very worried. I've been searching on google to try and figure out what's going on...... I can't tell if there is any swelling, I am quite chubby and hold most of my weight in my stomach and thighs so I can't tell a difference. When I laid down for a second it traveled down to the lower vagina area and to my lower back. I am a hypochondriac and I've been trying to figure out all day what this weird pain is, I'm going to call my pcp in the morning and see if I can schedule some type of appointment.....