shaking and scared pls help asap

so one of my outer labias hurts rlly badly, and it’s very swollen. I looked with a mirror and there’s like a scrap and it’s bleeding. I’m terrified. What is this???

I’m so scared what should I do? I don’t want it to get Infected or something

I had sex a few days ago and I was a little dry, maybe I cut myself bc of that? I’m scared and it hurts so bad