Help me Please! Am I pregnant?

Okay well this is what happened, this hapened yesterday last night, I was over at my Boyfriend's house and his Mom left to get groceries. So, We were alone. He asked me if I wanted to see his new guitar beats he did( we're into guitar stuff, we do it all the time but on the phone this was my first time over his house ) soo we went to his room. he showed me the beats and stuff. and my button went loose ( 3 buttons) so it showed half of my bra. and he got a ***** .. so then he was like " oh god " and idk then he asked wanna touch it ? i was like sure. then he took of my bra and my pants/under garments and I felt turned on so I had to take his pants off.. and he put his THING in my THING and then it went on from there.. it was 2 hours until we heard his mother. now i feel so weird and i'm only 15 and i didn't tell my mom :( i'm scareeed. i had food cravings now, morning sickness..