Hello, My Gums Just Below My Molars On My Right

Hello, my gums just below my molars on my right side are sore. It might be behind the molar too, but I'm not sure. Also it hurts to swallow just on that side. If I am not playing with the affected area, it doesn't hurt that bad. I don't have pain when I chew, but I do have some pain when I move my right jaw down or to the side.