Hello @painfulplanus, welcome to Mayo Clinic Connect. There is another active discussion where your post may have more visibility here and you will meet other members discussing lichen planus like @alpaca, @wisgrama, @elizabethbryant, and others:

Groups > Autoimmune Diseases > Erosive oral lichen planus
-- https://connect.mayoclinic.org/discussion/erosive-oral-lichen-planus/

Here are some more sites that may be helpful for treatment options:

Cancer Therapy Advisor - Vulvovaginal Disorders: Lichen Planus
-- https://www.cancertherapyadvisor.com/obstetrics-and-gynecology/vulvovaginal-disorders-lichen-planus/article/618152/

The Royal Women's Hospital - Lichen Planus
-- https://www.thewomens.org.au/health-information/vulva-vagina/vulva-vagina-problems/lichen-planus

Has your doctor offered any treatment suggestions?