I'm 16, Boyfriend Sexually Active My First Boyfriend First For

I'm 16, boyfriend sexually active my first boyfriend first for everything virginity n kiss n etc so we use condoms majority of the time?
Today around my mouth feels like it burning up to my nose and my chin is somewhat numb, I have not given him oral sex in like months and I'm very confused and panicking now because I don't want to catch anything plus my lips are very dry can someone explain to me