I think you should get it checked out too Ann. I have that symptom too sometimes. It's the worse symptom I think! Not painful, just really really freaky. I've read a few other people on the forum mention the same or similar symptoms, related to their head. Someone desciribed it once as being part of depersonalisation. Which makes sense to me. I think you'll find it's both muscle tension and panic attack. Sometimes I get sharp shooting pains in the head with this symptom. With me, that was neck related.
Take care, I know that feeling is anything but pleasant.