RED ITCHY BUMPS// SOS

i need someone's opinions VERY quickly...I only had sex once, when i lost my virginity. the boy i lost it too was also a virgin; this was his first time having sex. that was about a month ago, but recently, my vagina and the general area down there has been very itchy. i noticed some small red pimple looking bumps around the lips, but nothing on the inside. they bumps started spreading to my inner thighs near my butt...is this some type of std?? i really don't want to tell my mom, im only 15 and i have never been to the gyno...