Hey! Ima 24 years old girl, I'm not married, and I haven't have had sex, but me and my boyfrnd often have oral sex, cunnilingus, I have been having this problem since 1 year, it started in nov 2011, after my periods I got a small swelling just outside labia major, in da ingoinal area, a very small one, and den it ruptured open into an ulcer which was red, and den it healed after 2 weeks, den after my next period, I got da swelling again and again the rupture and ulceration, and this has been happening after evey period only it has grown from a small spot to involve more area, the swelling usually happens after periods, sometimes it starts anytime, and ven it ulcerates there is some blood and some yellow fluid pus like I'm not sure tough but its yellow ,
The swelling is painful and firm but not hard and not attached to any underlying tissue, and other than this I have vaginal itching severe one and also itching outside the labia.
What is this problem please I need help :( I live in a region where I cannot go to a gyneacologist with this problem, its very embarrassing, please I need help :(

Also I have tried metronidazole, augumentin, ciprofloxacin, nothing is helping :(

Plus, there are no other symptoms like fever etc, no discharge, but a different smell to urine