Thanks for all the advice about insomnia. I've always had horrible episodes of anxiety, but now it's not so much about AF as the fact that my partner has been diagnosed with mesothelioma, and much as I know it's just life that we all get sick and die, I can't think sensibly about it and dread the future. I really hate life at the moment, and myself for not having more courage and being taken over by pointless anxiety. So far the Diazepam at night doesn't seem to have made any difference, I still wake up in the early morning and stay awake trying to calm myself down.
I think it probably would be a good idea to take Flecainide regularly again - it was stopped after a second ablation - and will contact my arrhythmia nurse to see what she says.
Thanks again for your replies