Boomerangst

Hello everyone, I have felt strange for a number of weeks, visual disturbances, unusual headaches, weird tingling of the scalp and tightness on the forehead. About a week ago at work someone commented on a pit which had appeared in the top centre of my forehead just under the hairline and had I 'knocked it'. I didn't know what they were talking about. I did know I had suffered about 2 weeks of a band of tightness in my forehead commensurate with a pressure sort of feeling. I went straight to the bathroom and looked in the mirror and there was indeed a dent, a quite pronounced dent. I don't