They sell something called CellSensor on Amazon for $30 that is pretty good at measuring EMF and cellphone radiation. It was interesting testing everything out with it. It might be good to test your room if you really think something is wrong...the wiring inside the wall could be giving off a lot of EMF's.

I wouldn't worry unless you have something really close to your house, like closer than 1/2 a mile and I would be possibly concerned. Distance makes a big difference. All depends on how sensitive you are as well.