Should I be worried??

Soooo I’m panicking rn! So Me and this guy was been in a situationship for a couple months. From what I knew we were only seeing each other and it would eventually lead to a relationship when we’re in a better situation for ourselves financially. So ofc we stopped using condoms stupidly. The other day we were about to hook up and right as I’m getting on top he tells me that he hooked up w this girl a couple weeks before and she’s having a std scare. He told me this while his penis was right on the outside of my vagina, it didn’t go in but it did touch the outside. So now I’m not only do I feel betrayed but I’m terrified at the possibility that I now might have a std. I can’t get into the doctor rn since she’s on her honeymoon for another week. So should I even stress at all or am I okay? And as for the guy I slapped the spit out of his mouth, got my things, and left. He’s now blocked on everything!! But yeah any advice is helpful!!!