I've tried probiotics and they've worked for me restoring bowel flora and getting rid of bothersome symptom thrush. They need to be super strength proper ones, at least 30 billion to make any difference and with different strains. Taking a probiotic yoghurt will do nothing for you.
But so have various other things... kefir, a garlic clove popped into the vagina, Iodine bolus, eating oregano oil... multi pronged attack is the best idea!!!