So I'm pretty sure my girlfriend has an infection. I don't think it's an STD because I was only with 2 girls before her, and I have gotten tested because I found out the second girl I was with lied to me about a lot of things so I figured she might have lied about her sex history, so I went to Planned Parenthood and got tested just to be sure, and I was clean. I also don't think my GF is cheating on me. She was a virgin before me, and we waited about 6 months to have sex so I doubt she's turned into a nympho all of a sudden. I mean anything's possible but STDs aren't the first thing on my list of possibilities.

Anyway here's what's going on. Her family went on vaca to Florida and when she came back she had a yeast infection from swimming all the time, going around in a wet suit and being in the humidity. So she got the stuff for it and it cleared up. We obviously didn't do anything sexual during that time. About 2 weeks after that though, I started to notice that, for lack of a way to be coy about it, her pussy started to stink. Kind of a musty, stale smell and believe me it wasn't pleasant. Now we just did it today (which is about a month from when this all started) and when I pulled out, there was all this yellow junk all over the condom and the smell was nauseating. Before, her normal discharge was clear or a little white and had a smell, but nothing gross. Seriously, today it disgusted me and it was all I could do not to say something really rude.

Needless to say I have no desire at all to touch her or have sex with her even with condoms (which we always use), least of all go down on her which she loves, and also I'm worried about her health. Even if it's just a regular infection, those can get serious right? I'm also wondering how the hell SHE can not notice something's wrong, or if she's just choosing to ignore it.

Is there any nice way at all to bring this up with her, or should I just plan to get kicked in the nuts either way? I mean I have to do something, she's going to wonder why I don't want to do anything with her.