If you are both virgins, and all you have done is performed oral sex on her, your genital symptoms can't be caused by this. STDs don't travel like this - if the point of infection is the mouth, your symptoms would be oral. If the point of infection were genital, your infection would be genital and your symptoms would be genital.
It could be a UTI, but only a doctor who does some testing can tell you that for sure.
If you are both virgins who have not given anyone else oral sex, neither of you can have an STD. :) These infections need sexual activity to spread.
Also, good for stopping when you felt uncomfortable. That's important, as is communicating about it. When you get there - and there is NO RUSH, sex is a lot better when everyone is ready and able to talk about it. :)