This seems to make matters worse for me and I was wondering if anyone could relate or has had similar episodes?

When I lay totally flat on my back I feel pressure around my throat, particulary on the right side where all my problems are at the moment (it used to be the left side that gave me all the trouble but that has calmed down significantly now after 12/13 months).

Anyway, there is pressure and a pulsing sensation on the right side, it basically feels really, really uncomfortable/not right at all. I'm worried because I'm due to have an MRI scan soon and I don't think I could lay on my back for 20 minutes right now...