Will Penicillin help with any infection?

my SO and I had sex Wed night. Im sorry i know this is TMI but we had sex then i gave him oral then we had sex again. Then the on Thur i didnt feel good but didnt think about it to much Fri i was running a low grade fever and had spots on my throat. Sat morning i went to the doctors and tested positive for strep throat and was given Penicillin for 10day. Well we had sex last night and it was uncomfortable & kind of hurt so no i think maybe on Wed o could have passed the infection to my vagina so im wondering would the Penicillin help that too if i did?