have been told my mum in law who's a nurse that its the anaesthetic. So is the sudden and random sleepiness. And the sicky feeling that I thought was wind related. And she also said the wind is definitely time as initially, its not in our bowels or our stomach etc, its behind and around them. eventually, over a few days it passes through the stomach wall and out.
So good news - it will eventually end. Bad news - eventually.