Reports fatigue, head buzzing and difficulty thinking after installation of Wi-Fi expanders, with perceiv…

We have wifi expanders in my home. The day they were installed I felt extremely tired and had a buzzing in the front of my head. About a week later, I felt even worse and could barely wake up. I asked the person that installed them if they have a strength or if they can be turned down. he told me that they are turned up as high as is allowed. I asked him to turn them as low as he can and show me how to turn them off so we can sleep with them off. I think I no longer feel it at the low level, only at the very high levels. My husband tested things by having the tech turn them up again and randomly keeping them on and each time, within a few hours, I complained of fatigue and a buzzing between my eyes in my head and an inability to think. I believe it's impacting my thinking and possibly making me feel as if I have chronic fatigue symptoms, brain fog and headaches.