im a 19 year old female and i have only had sex with one guy and thats my boyfriend that i have been with for a year and a half now. i have 2 questions... 1) we have sex often not all the time. but every once in awhile the inside of my vagina will burn when we have sex sometimes it burns a little and sometimes really bad.(sorry for the details). 2) one time my boyfriend was going down on me (this was about 3 or 4 months ago) and like a week ago he told me i had a uncommon smell down there and he thinks its a infection but i dont think it is. i dont discharge i do only when im about to start my period or when i end my period but it only last a few days then i dont discharge anymore. im very worried what is wrong with me? what should i do?