Pain in abdomen

My period is in 10 days but im having pain in one side of my abdomen on the right.

I was wondering if i was pregnant yesterday because i had unprotected sex during my cycle

(18th September) (3rd September) (11th September) but he didn’t cum in me at all, i dont think my boyfriend pre cums because he’s really dry. We’ve been doing this since February and he’s dry. So im not sure

I took a pregnancy test yesterday and it came negative