I feel bad

Isha • I'm a bit of a mess if I'm being honest 🌻 18🇬🇧
I recently had sex for the first time although it didn't go well as I was on my period (towards the end). I didn't think I'd bleed as much as I did but the thing that's troubling me the most is peeing! It hurts so much whenever I pee I don't know if that's normal? Whenever I go to the toilet I'm just reminded of how bad I feel for doing it with someone who probably didn't care about me as he's not spoken to me at all since. :(