pregnant?

Kelly • Due June 29th ☺️
My boyfriend and I had sex on september 24 & 25 (we booked a hotel for those two days) weve done it acouple times that day and he cummed inside of me BUT i was on my period . Then on the 26th my period was light but it wasnt red it was brown . It was brown for the next 2 days . And then ladt night i kept waking up with CONSTANT stomach pain . And i kept farting (sorry lol) and then ive been trying to eat all day today and then after we ate my stomach was hurting bad and i had to go to the bathroom because i felt like i had diarreha and i did (sorry lol) and my boyfriend thinks i might be pregnant and we dont know it . Any thoughts ?