Suggest Treatment For Vaginal Infection

Hi, i am a married woman..Very often i get vaginal infections...i consulted a doctor regarding this issue....doctor told me it candida...she gave me some prescription...but tat works only for a couple of days and again get tat infection..i did google on this issue...i have itching,burning problems..is this because of any condoms.i mainly get when we have sexual inter course...can you please tell me how to prevent this infection so that i dont get this in future...