just a sort of rushing feeling - very scary.
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they found nothing wrong when pacing the heart
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I am anxious however due to other reasons
Reasons that make me think outside the box -
but remember, I'm a retired pilot, not a doctor.
If all tests fail to find anything, and given your age, you might consider the possibility of having had 'a touch of migraine.'
So many people have a kind of late onset deal, where it's nowhere near as bad, but the symptoms do manifest themselves in strange ways.
Have irregular heartbeats (since 1998)
Well, this may well be a factor, but you're doing all the right things now, however, I swapped with my wife as the family arrhythmia oddity at about 55 years old. Really pronounced miss-firing sometimes.
They went away for more than a year after stress testing. So, what's the deal with your hip. Are you able to have it replaced, with the hope of regaining a level of fitness?
Are you having the 24 hour monitor fitted? I had a GP's test after the funny thing I reported on JB 18 months ago - it was fine, but I started miss-firing the moment he took it off. Has to be long term sample.