I have anxiety about this too. Just last Saturday, in fact, my friend tapped my head when hugging me. What is it about women and hugging?

I agree with what DannyT said. My fears of minor head bumps have metastasized into a serious, debilitating psychiatric condition. It's to the point where I'm not quite sure how much of my symptoms are PCS, and how much are just anxiety. You don't want to let this get out of hand. Realistically, when a person hugs you, they are not going to be moving their arms at forces greater than 10 g's. Thus, it is inordinately unlikely any impact will cause a new TBI. Anxiety can cause a relapse of symptoms.