Sti??? Help

I was at a guy's place and we made out, he fingered me and I sucked his dick. We were naked and his penis touched my vag but we didn't fuck. Now I'm sick, have a very bad uti, tonsillitis and high fever. Do you think I have an STI or am I overreacting? He told me a few months ago he was tested and he was negative and he had a gf within the last few months. I get sick very easily and I have tonsillitis every 2-3 months due to my bad immune system. Nevertheless I'm so scared. :(