What to do!?!?

I woke up in the middle of the night having to pee and after I went I had a burning in my vagina all night that kept me awake. I did manage to fall back asleep for an hour or 2 and thought maybe it would feel better when I woke up but it still burns! It’s a Sunday and my doctor is closed today so I have to wait until tomorrow to make an appointment but what should I do!? I have a burning sensation in my vagina and a lower abdomen pain. When I pee it kinda stops the burning so I’m not sure if it’s a UTI, yeast infection or BV or something else. I don’t know if this matters but I did have sex on Friday without a condom because I am on the Nuvaring. How can I get a little relief until I visit my doctor?

Update: I have been in a monogamous relationship for quite some time so I highly doubt it is a STI.