itchy vagina,

Ok so for a few weeks now I’ve been having an itchy vagina I tested negative at my doctor for STDs, my new insurance at my new job does not start until August 1st. I do not have any discharge or Odor I believe it may be irritation or infection? I saw you could use yogurt and coconut oil. Any instructions on how to do this?? Please I’ve been suffering for some time now and can’t get to the doctor until next week?? Do I just use regular plain Greek yogurt?