About 4 Weeks Ago I Found And Indentation On The

About 4 weeks ago I found and indentation on the top of my head. It behaves like an expansion joint in concrete. When I wake up is it smaller and usually by the end of the day the indentation is larger and longer. Like earthquake plates. Right side is lower than the left. Any ideas? I have had a few headaches, I have Trigeminal Nuerolgia. One day at work I could concentrate and forgot what I said 2 seconds before. That has not happened but one time. I am tired and lack energy.