infections can occur from sex
with an untreated uncircumcised partner, have partner tested.
Also utis if u don't urinate after sex. Recurrent yeast infections can be proven by repeated positive cultures and may require long term (6 months) treatment. Avoid scented/dyed soaps & personal hygiene products. Etc. Shower, don't bathe. No synthetic underwear. Consult your gyn dr.