reaccuring yeast infections

hello I'm 41 yrs old. my husband died 7 yrs ago. I've been with my significant other for about 4 yrs. i have been having a yeast infection for the past 2 years constantly!!!. I have not been with anyone else. I don't use fragrances, scented soaps,or douches. I have changed to only wearing cotton underwear and none at night. i have been on diflucan for about 2 yrs. I've had a DNC bc of having so many Y.I.

I've told my partner that something is seriously wrong and to get tested.

I have not changed my diet now have I been eating yogurt or taking probiotics.

I think the yeast has gone throughout my body bc my scalp is also flaky dry and itchy... I don't have a bad discharge but I smell horrible down there when I get the YI. Also my vagina does not get wet anymore. I'm aroused but I don't stay wet. I get slimy wet and them boom I'm dry as a powder cake. I need help .I need to know what I can do bc I'm at the age where I'm am suppose to be enjoying the time of my life in bed and I'm just depressed