Infections

So since April I've had yeast and bacterial infections. I've been to the doctor many times I've been to see my gynecologist twice and they've given me boric acid and it seems like it went away. But then I went back there in August and she told me that it comes from stress why am not healing down there and then I'm supposed to blow dry down there.. it's been on and off since April at least for a week and then it comes back again. Can anyone help me on what I could do or give me tips. Oh and am not having sex either