Help!

Dajah

Me and my boyfriend recently did some sexual things. We technically didn't have sex, he just stuck it in once. We didn't use a condom, though. Now, about 5 days later, I'm having small cramps at the bottom of my stomach and I'm scared. I'm only 17 and I don't want to be pregnant. I have 12th grade to go through and then I plan on going to college. I'm so scared.