Hello! This morning I woke up and yawned. Once my mouth was fully opened a jolt of pain shot up my jaw to somewhere behind it. It felt like it was by my ear. At first I thought it was athletes ear because me and my little sister swam in our pool together the day before and she did get diagnosed with athletes ear. But I felt no pain when I pulled on my ear, no pain when inside my ear, and no fluids had come out of my ear like my little sister had experienced. I concluded that I didn't think it was swimmers ear. When I opened my ear slowly it was a mild pain. When I yawned or opened my mouth quickly, it was a significant amount of pain. Now, about 15 minutes later, it doesn't hurt at all to open my jaw. What is going on?