3 weeks pp sex

No rude comments please I know I should have waited and I extremely regret it I was super drunk New Year’s eve and me and my S/O had sex I honestly don’t even remember the whole night I just know it happened the next day I took a plan b because it was unprotected.. I’m extremely scared even tho I know ppl who have had sex before 6 weeks and have been fine I’ve been losing my mind about the risks of infection and being pregnant again I’m a ftm & I’m so scared and just been beating myself up about this has anyone else gone threw this ?