need help with burning vag

My vagina stings and burns when I pee! And I have to peeball the time lately! It's not a uti because I've had plenty of those and this is completely different. I don't think it's an std because I haven't had sex in a while and it's just come up recently. Oh and when I wipe after I go toilet there's the tiniest bit of blood on the toilet paper like it's grazed or something. It's only at the bottom of my vagina like the end closest to my anus. It's stings every time I pee which is every 20 minutes... any suggestions what it may be. (I'm not substituting this for a doctor, just want some sort of insight in case it doesn't get better and I need to go)