Jezabel - Balance Activ is for BV, not thrush, just to clarify.
Natalie, all I can suggest is that you give your bits a few days off when you can, e.g. don't work during your period or every day if possible. I find my clitoris can get very sensitive, but after a good night's sleep it's usually back to normal. Also, if any client is rough with it, just stop them and say you've got too sensitive.