Thanks for all the advice
It seemed only to be a temporary thing. It lasted about a day and a half. To be fair I'd gotten a cold and wasn't feeling to well either. Anyway, today I went back to 3 x 20 minutes sessions but there was an instant when I almost had to physically jump up and stop. I got this overwhelming feeling to open my eyes and just stop. Meditating was almost a physical pain it was so bad. It was a mental thing though, I just did not want to meditate. Even though I visibly flinched a few times, I rode it out and just sat.
I guess what I wanted to know, was is it better to sit for numerous shorter sessions, or sit for one longer session.
Also, whilst I'm typing, a side issue of late, is that my mind has become a torrent of thought. It's very weird because, I haven't zoned out or dozed off, but I catch myself thinking for most of the sitting.
Any thoughts on any of the above?