My boyfriend fingered and screwed me

Me and my twin sister was with our boyfriends walking home from the park and our mom wasn't home se they chilled and my sisters boyfriend Desmond was being kinda rude to me he was like if I wanted ha (to my bf) I could've had ha ate ha out and everything (he was talking about me) I was getting upset so my bf was like shut up Desmond and then we went in my room and left my sister wit him so me and day day was making out then he grabbed my ass cuz I was on top of him and he said "is this ok" and I said yes then he started touching my p***y cuz I got off him and he said "is this ok" and in my head I wanted to say no but I really like him and then he started putting his fingers in me and I was moaning loud so we turned the tv up loud so my sister and Desmond wouldn't hear and after he fingered me he started putting his penis in me and he had on a condom but idk if I'm Preggo or not cuz I'm late and I don't wanna take a test and by the way me and my sis are 15 and Desmond is 17 and day day jus turned 16