Hi weety,
me too,I'm experiencing similiar symptoms as you,but a tightness on my head like I'm wearing an invisable hat thats too small,and the burning sensation happens my face and ears but usually just on 1 side.The ringing/screeching in my ears is not constant ,thank God,so has not bothered me too much.However I can only spend very limited amounts of time at this computer now,sometimes my brain feels rattled if I spend more than 20 mins a day.Like it's seriously rattling/shaking inside my head.Isn't that freaky?I would never have believed it if someone had told me,untill I experienced it for myself.Our dog has also been having strange turns, like
mini-fits,where she seems rooted to the spot,but sways like she's losing balance and she shivers and squints her eyes.I never made the connection before ,but I believe she is seriously effected by the masts &EMF ,poor thing.
A friend of mine recently suggested that I try wrapping her in one of those foil hypothermia blankets,you know the ones used for after marathons etc.He has seen it stop a dog from convulsing before.I think you can buy these in camping shops.

Maybe you are right,maybe mercury poisoning is the main problem,but I believe we are all poisoned to some extent and also everyone is electro magnetically sensitive to some degree.
But from my personal experience being mercury poisoned and being electrosensitive is a flipping nightmare.

You said you plan to have your 16 amalgams replaced and that you hope to be cured.
For me I did not learn that I was electrically sensitive untill after my amalgams were replaced and now I think my EM sensitivity has been a huge part of my problems during all of those years.But the fact I was being poisoned daily by my fillings just ran me so down I was sensitive to most things.
Now ,for me ,it's a question of rebuilding my immune system & health.Finding some way of managing my life amidst all of the EMpollution ,informing people,and I'm seriously considering ,sometime sooner than later sueing my neighbour for placing a mast on his roof,without any consideration for the lives of people.