So I’m 21 years old and was sitting down and had my headphones on like I do majority of the day I don’t have them very loud. I noticed in the top right of my head sort of a shaking/rumbling feeling I heard it in my right ear slightly. It’s the first time it ever happened to me and I’m scared and afraid it’s something really bad. Now keep in mind I have no idea if I have any diseases or anything I’m usually clean of a lot hardly ever have headaches or anything at all. But like I said a spot of my head sorta jittered for a second or two I’m worried is there any common reason this could happen ? I’m scared it is Parkinson’s or a tremor. Just a random head rumbling that has never really happened to me before. Does this normally happen to people