I get thrush every 6 to 8 weeks. I'm on immunosuppressing meds which are believed to be the culprit. I get the 'obvious' symptoms but also very bad lower back and stomach pain, which is odd because I take strong painkillers due to another condition. I also feel incredibly tired and sleep all day/all night with it.
It's pretty horrendous and the I require 7 pessaries to even touch the symptoms. I cannot take the oral capsules (fluconazole) because they interact with another medication I'm on. Is there anything else I can take/do? 
I wonder if I have it in my stomach/bowel too because when it flares up, my bottom appears to have some sort of thrush too...? 
(Btw I have had so much medical advice. I've seen a dermatologist, gynaecologist and every GP in my surgery. I have tried various creams which do help a tiny bit but not much. I'm also not sexually active and don't wear tight trousers etc.)
It's making me really fucking miserable.