Soreness and pain

My boyfriend and I have been having a lot of sex lately, and the other day it got a little rough and I wasn't properly lubricated. I need something that's gonna take this pain and irritation away because it's making it hard for me to wear underwear or sit down. Helpppppp. I've looked into some things on google and they called it Vaginitis but I'm not for sure. I'm only 17 so I'd really rather bring it to my mom's attention.