I meant to add that most yeast infections indeed respond to terazole and similar treatments. However, 10% are resistant. You should return to your doc and discuss your continuing symptoms. But this doesn't mean you have herpes. (In fact, it's further evidence against herpes, which rarely lasts 2 weeks without getting better.)
Relax. You can trust your doctor's diagnosis. Almost certainly you had a yeast infection, not herpes.
There is misinformation widely posted on the web saying that herpes and yeast can be confused with one another. This is true, but only in this way: A woman has genital itching, doesn't realize there are herpes sores, and assumes yeast is the cause. The symptoms recur from time to time, which can happen with yeast. When herpes is finally diagnosed sometime later, she then realizes that what she thought was yeast really was herpes. However, gyn's don't often confuse herpes with yeast on direct examination. Your doc did it exactly right: it isn't normal to culture for yeast; visual inspection is the usual way to diagnose it.
Anyway, your symptoms sound more like yeast and the timing of your symptoms was wrong for herpes. Most important, a negative blood test 3 months after the last possible exposure is also strong evidence against herpes. Putting together all the evidence: symptoms, timing, doc's diagnosis, negative virus test, and negative blood test, it is not possible that herpes explains the symptoms.
Best wishes-- HHH, MD