Suggest Remedy To Relieve Pain, Itching And Swelling In Vagina

I'm almost 16, 5'5" and 110 lbs. I have had unprotected sex for the past 3 days (in a row). Two days ago I was sore but didn't think anything of it since I am usually sore afterwards, but today was different. It seems like chafing to me from the lack of lubrication. It seems to be a little swollen and itches like crazy! It is also very sensitive. When we were having sex we did try some new positions (I don't know if that would cause any problems). I am not planning on having sex for a couple of weeks. I was wondering if it would go away in the matter of time or if there was something I can do to eliminate the pain. Is it something I should be concerned with or any serious problems? I was also wondering if there is a way I can solve the problem with out seeing a gyno or is it necessary?