vaginal friction

Liana
So I think I have vaginal friction. Mainly because the entrance to my vagina and a small side next to it look red/raw and hurt to the touch. I haven't had sex since last Tuesday night, but it burns!! Ik it is not an std as both my partner and I are clean and only sleep with each other. 
My question is how do I soothe the burning?! I've stopped sleeping with underwear and using summer's <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> for a while but that's not helping irritation. Also how long does it usually take for it to heal?