Suggest Treatment For Sore And Swollen Throat

I had protected sex. I also have horrible allergies, and got a sore throat swollen and everything and went to the doctor for it, which they put me on amoxicillin (this exact sore throat happened the past 2 yrs, last I didn't take the amoxicillin cuz I felt better like the next day) however it has been like 2 weeks since the sex and me taking the amoxicillin. I get random hives lately that go away like 15 minutes after getting them on my arm (usually after I'm outside) I also seemed to be getting a yeast infection. Now I'm curious to know if this could be from the amoxicillin or possible something like HIV. the kid I slept with is a good friend, but ppl rumored that he was HIV positive but I've known him for yrs and never did he say anything that he was and he would have told me if he was... so I'm curious if I should get tested or everything is just from my prescribed antibiotics?