What is the most logical next event?

How to tell your girlfriend you have an std
Learn the facts.
Once you know what std you have, learn what you can about it. That way, you can be prepared for any questions your girlfriend may have.

Pick your answer from:
(1). There's no sense in worrying about it if you've already figured it out, though. Most people know more about std, but even if you don't, there is some risk to revealing too much.
(2). Most of the time, a sensitive or curious person will ask if you have an std. If your girlfriend just has some questions, you'll be able to elaborate to her.
(3). Plus, you'll need to know that information for yourself anyway. Your doctor may have handouts on the std, or you can find reliable information on certain websites, such as the mayo clinic or the cleveland clinic.
(4). However, it's perfectly normal to know the most basic things about std before talking to your girlfriend. What you are tested for, your partner will probably learn.
(3).