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Just to let everyone know that the pan came back and I rang 999. The first responder came, followed by an ambulance. They did several tests, all normal. They gave me paracetamol and two seconds after, the pain went! Not due to the paracetamol (obviously!) but it went and hasn't returned. They say it could have been trapped wind (which is really painful, apparently) and now it has gone. I'm sorry the thread has gone the way it has, it wasn't meant to start an argument. I am feeling much better now.