ok so my boyfriend and i had sex last sunday. i was sore after which was weird becuase we have been together for almost 3 years and we have been sexually active. so wed, i was itching and sore still... my friend told me it was probably a yeast infection so i went to the store and bought med. for it. i took it thurs night, fri night, but i forgot to sat night. so i took it tonight. and i have been itching still... however i noticed today that one lip is swollen and its the only one thats itching.. what is it?? pleaseee help me