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Ta for the link Sibs, but it doesn't sound exactly like my symptoms. I don't get an initial shooting pain, it's a dull ache, that gets steadily worse as the evening comes and is ruddy 'orrible by the time im trying to sleep. I can only assume the act of actually laying down is making the problem worse.
I did suggest trying to fall asleep sitting up tonight, but Mr Boo looked at like id lost my marbles, so perhaps I won't try that one!