If you take a 150 mg fluconazole oral capsule that could rule out the thrush if it might be that. A gynae told me that thrush is systemic anyway & the capsule the best way to tackle it. I’ve had vulva pain for some time amitriptyline , gabapentin & pregabalin in the past did very little to help at any titrated level. That leaves vagifem & Ovestin in the armoury & trial & error with that. You may find some answers or others experience on the Healthunlocked website under pelvic pain or the Hope pudendal website but later site is quite depressing. I read in your earlier posts that you have had prolapse surgery do you think that something might stem back to that with nerves being disturbed ? Burning can come from nerves or tightened muscles. Just my thoughts.