Hi. I had the same symptoms as well. I've been having this for the past few years but not often. Today i was alarmed by the "zap" or pinching feeling at the upper left side of my head that i had to stop walking or touch that part of my head because it hurts. And it last only for a few seconds and then comes back again. For days it'll go off then come back again. I really want to know if this is serious or what. I don't really wanna go check a neurologist cause i don't know if I'm scared or over reacting.