Possible STD?😰

Basically I had unprotected sex for the first time today with my bf, while he was my first, I was not his, he had lost his virginity to a prostitute a long time ago but he used condoms, so I’m wondering if its possible that i get any diseases like chlamydia or any of that sort. I took a plan b to be safe but I’m worried I might catch a disease? I trust him when he said he used protection with his first sexual encounter, should I still worry or do u think I’m fine?

Regardless I will be going to the doctors to get checked, don’t know when but I will 🤧