YEAST INFECTIONS ON YEAST INFECTIONS

hellppp me please anyone !! I got my first yeast infection in July and I've been basically getting all the time!! I treat them with a one pill prescription that gets rid of it but it just comes back a couple weeks later and doesn't go away!! My doctors getting annoyed that I keep asking for her to make that prescription but I don't know how else to treat this.. they keep coming back! I've tried a bunch of things. I stopped wearing underwear to bed and that helps a lot but there's still a slight itch that never goes away.. it was really bad when I had my iud so I had my iud removed thinking it would solve the problem but I hasn't!! I just want to get my vagina back to its normal health :(