That makes the chance of STD zero for all practical purposes. Ignore your symptoms and I'll bet they go away. But if they don't or you cannot, get examined for peace of mind.
Your symptoms don't sound like those of any STD. They are, however, typical for genitally focused anxiety. While anxiety may not creat symptoms out of the blue, it certainly can magnify normal body sensations or other minor discomforts to a point of pain.
The thing to do is talk with your partner about symptoms she may have had, and to learn whether she has been at risk for STD or has been tested recently. If there is any doubt, the two of you could go together to an STD clinic (or any competent medical provider, e.g. a Planned Parenthood clinic) for examination and STD testing. My bet is that nothing will be found.
I hope this helps. Good luck-- HHH, MD
I did..she said she has not been with anyone for a very long period of time and has experienced no symptoms of anything.
have you asked your gf about her sexual history? That would probably be a good first step if not...