Thanks for all your thoughts.
Hurdity - I know that I suffer from anxiety that is not effected one way or the other by HRT [I have tried with and without]. I have always been a glass half empty person and a worrier and am no entrenched in negative thought patterns.
And I already do yoga, run three times a week, take a walk every day, cook every meal from scratch, am not overweight, etc, etc, etc.
Not sure what else I can do to be honest - I've tried CBT on the NHS but found it fairly obvious and the constant need to write everything down just exacerbated my problems!
Am better today - no stomach issues at all, just back to the original bubble under left rib feeling, but it is at the side today, so at least some change! Still not opened ADs, but feel reassured they are there. I just need to 'get outside of my head' and stop obsessing - I am never bad when busy working and amongst other people, it's locked in my head that it all bubbles over. There was an interesting article on BBC news yesterday about 'cyber chondria' and I feel I am guilty of that to a degree. And probably, this forum doesn't help as all I'm doing is looking for reassurance but the constant checking/reading just fuels my health anxiety. What I need to do is something other than think about my health.
So thanks to all of you, but going to give this a rest for a while.