if you have HSV1 on your mouth and you perform oral on her, yes you can give her herpes. it's not the typical strand for genital herpes (HVS2) but it exhibits itself in pretty much the same way. DO NOT do this to her haha. that happened to me from my boyfriend and it really sucks. if you don't know for sure if the sores are from herpes or not definitely go get tested, it's really not a big deal. as long as you're careful about it it's a very very minor problem and completely manageable. best of luck!