I recently got wifi in the house and have been leery of it since reading tyw's concerns. I would try it from time to time and see if using it made a difference in how I felt. The last time I used it, for about a half hour, my head felt weird, like it was humming on a low level. It wasn't quite pain, but it was disturbing. I was then firmly convinced that it's damaging for me. I am going to get a cabled setup in its place.
When I was a child, my father used to make us back away from the television if we were too close. Radiation! He was right about that at least.
Are you Eastern European by any chance? I have visited all of those countries and in every single one of them this is still a common warning given to children sitting on the floor close to the TV. Boy, am I glad I listened to my parents back in the day