Taz2, it's stopped now. It stopped for a bit once I had coughed up the clot, then about twenty minutes later it started again.
I sat pinching it for a while with a bag of frozen peas on bridge and that seemed to do the trick. I'm more concerned now as to what has caused it, as it's something I have never had before, and quite frightening. It has done my anxiety no good whatsover I can tell you! Now I'm just sat waiting on it to start again.
