I've been reading these posts and crying. Thanks everyone for your kind thoughts. Yes I'm home now. Discharged.
What a scary couple of days that was.

I have a very low resting heart rate and low blood pressure.
I need to take care care and be aware of this, and rest straight away if I feel the same thing happening again.

What happened...
Thursday evening, I just finished with Mars and swung over to Saturn. I was just lining up in the FOV of the webcam and focussing. Crossing from scope to computer screen time and again. All of a sudden I came over queer, dripping with sweat and nauseous. Next thing I knew I was on the ground with my glasses spread all over my face and a sore tummy.

Still feeling horrid, I managed to get back inside and dial 000.
When the ambos were loading me into the back of the ambulance they were asking what I was looking at through the scope so I told them. It was pretty funny really, them stopping to have a naked eye look at Mars.

I'm resting now. Feeling quite exhausted.
Thanks again everyone.
xox