Need help for painful white gums right side of face?

I have swollen painful gums just on the right side of the lower molars. It started yesterday but today I woke up and the gums are white and swollen and look like canker sores! The rest of my mouth is fine. I'm not sure but it looks like I may be getting a tiny cavity so don't know if that has anything to do with it. But my ear and throat on the right side are painful too. I'm on vacation so need some remedy for now, any suggestions until I get home? Any idea what it could be? I can't find anything online like this. THANKS!