Ulcer present on my miss v, help me

Assalamualaikum dr, saya perempuan berumur 21 tahun, belum pernah berkhawin dan tak pernah melakukan hubungan seksual. Saya ada appointment di neuro department for multiple sclerosis but it still in investigation.

3 minggu yg lepas saya ada buat self check on my miss v and i noticed ada red patch on my miss v,specifically on labia minora, im not sure sejak bila red patch tu ada dekat situ. But it didn’t catch my attention as i think benda tu mungkin normal…

Seminggu lepas tu, suddenly i noticed that area stings when it touched water, so i checked it once again, and i can see there is ulcer present on that area, but the pain from it, is still tolerable, and it hurt sometimes when it touch water only, other than that everything okay…

Masuk minggu yang ke 3, selain daripada ulcer, saya ada symptoms sakit sendi di ke dua2 bahagian kaki. The ulcer become painful and no longer tolerable. It sting all the time walaupun tak kena air. Duduk salah, berdiri salah, jalan pulak sakit, kena air lagi la, sampaikan i spend almost an hour just to pee, because it hurt bila nak basuh… and the ulcer macam makin besar sikit…

Kenapa ya saya develop ulcer ni? What should i do, im scared of doctor, and it kinda embarrassing to share about this problem in front of doctor

Ps: saya dah guna alat penjagaan diri seperti bedak, shampoo dan sabun yang sama selama 2/3 tahun tapi tak pernah jadi kejadian macam ni…