Keza, Marcella: wrote exactly what I would have if she hadn't done so first. You had not mentioned your active sex partner as an aspect of your infection in your initial report. Just imagine, physicians deal with these sorts of complexities during diagnosis and treatment all the time.
The boyfriend issue ties into my previous thoughts though, with your giggle included, that you need to clean and re-clean everything your vulva might come in contact with, especially your boyfriend! It is really amazing that guys can carry the yeast infection around and not show any symptoms at all. It probably has something to do with the consequences of testosterone, and the consequent pH of their genital area.
Isn't it ironic that trans-women provide enormous bodies of evidence that our bodies are influenced primarily by hormones, not genetics. Your hormonal and physiological condition have combined to give you medical girl problems by the ton! But rest assured that your risk for yeast infection is likely to subside after just a couple years go by and as neo-vaginas become less and less "neo" it seems like they become better able to fend off the Candidiasis monster, in my experience.
http://en.wikipedia.org/wiki/Candidiasis