It always helps/gives comfort to check with your doctor when you have a new symptom, but I am familiar with weird head stuff. I've had a CT scan and MRI to rule out anything going on with my brain. Both tests came back totally normal. I carry, like most anxiety sufferers, a TON of tension in my neck and shoulders. Right now I actually just reminded myself to loosen my shoulders for like the twentieth time today. That tension can travel down and up...into your neck and head. I have had that feeling of numbness, too. I was never numb, but it was that tingling like sensation.
Hope this helps!