First time

Nicolaus • Trans male I really like animals and plants in love with a beautiful girl❤️🌸
Okay so, I've only ever had oral sex because I've only been with the female genitalia so technically I'm a "virgin" because I've never been with someone with male genitals.
Tonight was my first time however with the male parts.. I know it's supposed to hurt a little she said I was really tight and while it didn't hurt during it hurts a fuck ton now. 
I don't have an STD I've been checked. I'm just making sure this is normal.