What i'm gonna tell you is based solely on my personal experience and is not backed up by any medical knowledge.
I'm prone to anxiety attacks, get real bad ones about twice a year, and mild ones every now and then. I'm also under a lot of stress due to college and such.
I experienced something similar to what you described a few months ago. I've been smoking back then, and out of the blue it would come, usually when I worked in front of my computer - a short lasting, sharp pain, right under the skull, at the right top side of my head. It kind of freaked me out, because I thought that stress and smoking were finally getting me.
Then later, right after another such pain occurred, I felt intense pressure in my head, a bad heart palpitation, and was literally losing consciousness. It felt differently than during your "normal" anxiety attack, because I was literally losing control of my arms and legs, and could barely stand straight. I looked up the symptoms online, and they were similar to a stroke.
Then a few days later the same happened again - numb legs and arms, difficulty speaking, head pressure, and a really bad heart palpitation. So I called an ambulance. By the time I got to the er, I kind of calmed down, but still could feel numbness and a weak pain in my head.
After I described my symptoms to a nurse, she told me that if that was indeed a stroke, I wouldn't be sitting in front of her discussing that with her. A doctor came over, talked to me, didn't say anything conclusive, and just asked if I wanted to take a brain scan. I figured I wouldn't and left the hospital.
That was not it, though. For about a week afterwards, I felt like my head was filled with cotton. I was sleepy all the time, and really sad about the whole thing (a depression?). I searched google for tightness in a head, blah blah blah, but didn’t find anything. The condition wore off after next semester in college started.
The conclusion - I really don't know what the heck that was. That couldn't be a stroke, because I was not affected by it in any way besides that tightness in my head. But at the same time, it was unlike anxiety attacks which i'm rather used to now.
:? :?: