Help!

millenium

so i've been getting yeast infections since i was in 4th grade... im 18, almost 19 and in college now! I have been to the doctors 50+ times over the years (literally) and they dont know why i keep getting them! like they will heal, then come back within like 3 or 4 days which is fucking annoying! (excuse my language im in pain) so i know there are different kinds of yeast infections, i've been tested and treated for all and i still get them... like when i get them, i dont care about the burning or itching, i can handle that. but based on where in my libia they are (usually lower, nearest to my anus but still the vagina) its hard to move, walk, FART, sit, crawl, pretty much anything normal is hard to do, even sleep! my mom and my sister told me to try preparation H (yes, i know its for hemorrhoids, which shows how much pain im in) and i just wanna know if anyone can confirm relief from this or anything to help me!