Suggest Treatment For Constant Thrush And Cystitis

I have had constant thrush,cystitis for about 7 months now. had swabs all done and everythin came back clear except for saying i had thrush. I dont know what to do anymore i cant handle anymore. I am so itchy that i am bleedin,red raw skin,hurts when i pee,horrible discharge that is thick and smells,i have to throw my underwear away cause its disgustin,whn i sleep with my boyfriend thats whn it gets worse and the pain during intercourse is agony and i am very dry. have been give antibiotics which clears it up but comes straight back. please help me?sherene