Is there a particular place or time that you get this? I ask becasue my husband is affected by electromagnetic forces. His gets worse if he sits too close to the computer and we had to get rid of our cordless phone and keep mobiles switched off in the house - we also think that our sprung mattress is a problem and we are about to change it for a foam one - he also has problems with chemicals though, so it is a hit or a miss!
Try switching things off at the plug rather than leaving on standby as well, it may help.