yeast infection ?

Ok so I had sex last with my boyfriend last Friday so over a week ago. Yesterday my vagina was just so sore out of know where and just like feeling weird. I haven't had any weird discharge just more liquidy. It hurts/burns to pee it's not a Uti I'm certain but vagina just feels dry. 
I would go see a doctor but Job had an issue with the insurance so I would have health inrusance again until dec. I feel so uncomfortable. Should I but over the counter treatment for it ? Idk what to do.