Had 2 yeast infections within 5 months. i am hiv neg took 10 hiv tests up to 9 months last exposure. what could it be the cause , it is really stressy?

Not unusual...: HIV usually does not predispose to increased yeast infections, despite what you have read about it. Having 2 yeast infections in 5 months isn't unusual at all. Having 10 HIV tests in 9 months is excessive. All tests more than 3 months after your last exposure were unnecessary. Don't have any more tests. See your doctor if your yeast infections increase to more than 4 times a year.