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Hi, just to update, I spoke to my doctor yesterday and after listening to my chest he really does think this is all down to stress. He's been really good with me, taking time to listen to my fears and though he is loath to do so has said he will prescribe something for for anxiety if I really want it. I'm already taking a light sleeping tablet so I'm going to give it a while longer and he has said that as soon as I need him just to ring and he will see me straight away, which in itself is very reassuring.
I feel a bit better today, so if I can keep this up, all should soon be good :0)
Lisa x