Help! Irritated Vulva and Rash like symptoms for MONTHS.

I have been experiencing itching, dryness and tears on my labia minora for months. It gets worse throughout the month.  Skin is rough. Herpes tests are negative.  My doctor's have ran STI tests and have been able to come up nothing. 

Ask To be referred to a dermatologist it looks like a skin condition to me I have  got Linchen Planus and it needs to be controlled with a steroid cream , and I have to be seen every 3 to 6 months because it can turn to cancer there is another condition similar to this