Sounds like it could be chlamidea, which is easy to cure, but you will have to get tested to be sure. I'm sure she didn't mean to give it to you. You should talk to her about it though so that she knows and can get tested/treated too. If it is chlamidea, it can make her (and possibly you, I am not sure of males) go starel, where she can't have
anyway, good luck with it. Hope its nothing bad.