you can't diagnose and treat stis without a doctor's help. how do you it was even treated at all if you aren't even sure which sti you had? where did you even get the medication from? you shouldn't have slept with her without being sure you were clear of whatever you had. did you use condoms? though the bleeding could have been caused by many factors, i know one of the symptoms of gonnorrhea in women is bleeding. your health is important and so is the health of your girlfriend so if you love her like you say you do then you will TELL HER and both of you can go and get tested.