Stressing about being pregnant!!

Mi

Ive wrote on here before about my mishap with my boyfriend. We both were naked and I was on top of his penis, his head was no where near my hole... he didn't ejacualate and if he did have precum he literally peed right before we did this. There was no penetration at all. I was literally on for maybe a min. I'm freaking out that I could possibly be pregnant. I'm 2 days away from my period and ive been so worried. 6days before my period I had experienced lower back pain, last Tuesday I had a headache and Thursday my right side below my stomach was hurting (maybe ovary area).. today and yesterday when I ate I got the feeling I was hungry maybe & had to burp but it wouldn't come up.. this happened the day before ovulation also..