After first time having sex....

I’m 16 and had sex for the first time 3 days ago. (My bf and I used a condom, pulled out and I’m on BC). We had sex twice in the past few days and today I had a lot of anxiety thinking I got pregnant somehow. Now I’m a little worried something’s wrong. Right before where my vagina starts it’s kinda achy every once in a while. I felt stomach cramps a few times today. But idk if it’s just me paying to much attention because I’ve been panicking a lot today (clammy hands, shitting, peeing more) all because I’m nervous. (I always tend to over react). Idk I just feel really worried and needed to post about it :(