Unexplained Pain

Hello everyone
im a 19 year old girl, and recently I feel a weird and unexplained pain when im having sex with my boyfriend.
Before you can answer, here's a little background:
i've had sex many times in my life, for almost 3 years now, I enjoyed it and never had a problem, or felt pain during intercourse.
Ive been to 3 doctors (gynecologist) and none has diagnosed the unexplained pain.
The pain is not only during the intercourse, and it occurs during the foreplay. It hurts also when I masturbate.
The pain is in a particular spot, but most of the area is irritated and sometimes swells.
Im taking birth control pills (jasmine) for almost 3 years now. In 2 weeks I will start using malian (the doctor gave me).
I have this problem for quite a long time (4 months or even more).
The pain does not occur because the area isnt wet, we have tried to use ky and other produts.
I am 100% sure the problem isnt psycological, I feel the pain and i'm 100% with myself, im a good looking girl, and I love my boyfriend, so mental issues arent the problem here.
Recently (2 months maybe) I feel the area itching after me/my boyfriend touching it. The 2 times I went to the doctor afterwards showed I have a fungus. The doctor gave me the required medicine and it was ok afterwards, but it still remains itchy even now after I touch the area... Could this be the source of the probmlem? I must say that the fungus healed completly before I tried to have sex again.
Im trying to have sex with my boyfriend once a week (when he gets back home).
I'm quite desprate because ive been to 3 doctors, and neither one have found the reason for my problem.

Hope I will get an answer here ;)..
Maya.