Recently i have been experiencing really bad burning and painful sensation in my vagina usually inside the libia, towards the end and after having sex. which soemtimes gets really raw and even starts to bleed. This later disapates but then will come back the next time i have sex with my boyfriend. Ive tried researching the symptoms online but i cant seem to find symptoms that really match up. The symptoms are very simliar to a yeast infection but i have experienced a yeast infection before and it just doesnt feel the same. I dont have any itching at all and it only happens with sex. Both my b/f and i have been recently tested for std's both came back negative. Im just very bothered and need to find an answer. any help please?