(GIRLS) Need advice from sexually experienced women, for a girl.?

My boyfriend ate me out and fingered me yesterday. I woke up this morning and my crotch has felt... well I can't tell if it's itchy or sore. Feels like across between both. I thought it'd go away but it hasn't. Could I have a yeast infection? I AM A VIRGIN. This is the second time he's been down there, AND gone inside. Is this from the friction or my vagina not being used to it? If I do have a yeast infection, what should I do?