His and Her Health

I have had this problem for so long.It began right after a colposcopy. I am so sick of it!!! Every month right after my period I have what feels to me like a yeast infection( I am prone to these). My first doctor told me I was crazy and it was all in my head and prescribed me antidepressants. My next doctor prescribed me diflucan to take once a month and this was wonderful. Now I cant get diflucan and am back to itching. I try to use Monistat but all it does is burn me very badly. I need some help!!!