Pregnancy Paranoia!

Hey guys I'm new to this app but I need some comfort! I'm 17, and I recently lost my virginity (exactly a week ago from tonight actually) to my boyfriend. For some reason, starting yesterday my breasts are sore, the same feeling I get in my boobs when I'm about to get my period. I don't really have any other symptoms but I'm so paranoid of pregnancy! We used a condom but for maybe the first 3 minutes he didn't have one on. I guess there could've possibly been precum? But he didn't ejaculate in me, he lasted pretty long surprisingly. Legit every small cramp I get I relate it to pregnancy. Am I just freaking out cause it was my first time or what? Lol