I have felt the same thing. I mentioned it to a co worker and he also felt it. I since bought a microwave energy detector and noticed my phone is off the charts compared to other phones.
there have been all kinds of studies on how cell phone usesage affects us....not sure there was anything conclusive, and everyone reacts differently to meds, treatments and cell phone use.....maybe u should try using the speaker phone and see if there is any change...I'd be interested...I do not use a cell phone that much, let me know how the experiment goes.....
Good luck
Godspeed
"selma"
thought I would try to bump this in case anyone had some thoughts...thanks!