During sex, infections can spread from one partner to another. If your GF has had bacterial infection this can come to you too. So get yourself examined by a dermatologist and get treated.
when she took the pills you have not been treated, so the bacteria or fungi have to be removed from your body by treatment too.
Next Steps
SEX can give STI to partners. This happens in many individuals as the person may not know he or she is having infection and the persons immunity can keep the infection supressed, but when it goes to the partner, it can cause more symptoms and this causes the partner to suffer. Treatments of STI demands that both partners must be treated.
Health Tips
The best way to prevent STI is by using condoms at sex, Always