Try consuming "good bacteria." You can get a supplement, like Shaklee's Optiflora (www.Shaklee.com); and I'm a distributor. So if you decide to go that route, I can get you a good discount. It's also found in yogurt.
I had an infection about ten years ago, and got another one during my second pregnancy. Soooooooo embarassing! I ended up talking to the doc about it, and he had me pick up some Monistat, or something. They say you're never supposed to diagnose it yourself, though, because it can be something worse. And you especially want to be careful since you are pregnant (thrush in your baby). You can get a test from the store (CVS) that will give you a better idea without having to see the doc.
My daughter ended up with thrush for four-five months. It made it hard for her to nurse, and hard for me to tolerate her nursing. We made it through it, though.
I would just suck it up, and talk to your doc. Like you said, "He's seen worse." And yeast infections are very common during pregnancy. He'll know best what to do for you. In the meantime, keep doing what you're already doing for prevention. And add the supplement or yogurt.
Good luck!