Thanks sabredog, I feel okay but the shortness of breath with no energy at all gave me a bit of worry, 2nd time in 4 weeks.
The doctor I saw said it could be a problem with my left heart valve, which is why he wants me to have the Echo scan done.
I'm not really surprised because I had Rheumatic Fever as a kid which damaged the left valve in my heart, I was told at some stage that the valve would need replacing at some time in my life, so the worst case scenario is this maybe the problem.
Sorry to air my problem on the Forum, but I got a bit carried away with typing.