I'm a 17 year old male. I was a virgin before last weekend. Last weekend, I hooked up with a guy from school who is also 17. We only had oral sex, but we both swallowed each other's semen.
My sperm now looks a little different than what it usually looks like. It looks more yellow. I don't know if my partner has any STDs. He assured me that he doesn't, but when I asked if he has been tested, he told me no.
I am really worried that I might have an STD now. Am I overreacting? What should I do?