I'm A Gay. I Just Had Oral Sex With A

I'm a gay. I just had oral sex with a male with unknown status ( maybe positive, I cannot make sure) earlier today. I found that I have several wounds in my mouth, and one of them is bleeding. My mouth just touched his pre-cum instead of the real cum. I read a lot of posts here, which indicate that it's unlikely to transmit HIV via oral sex. But I'm still worried about that, since I have a bleeding wound. If you think I need to get the PEP, I will still have 48 hours.