sleep will come with time........dont worry yourself about it...i know it can feel tough but the more you fret the worse it will get......me anyway.
With the stomach knotted up......i would eat very little quiet often.
Like id keep a packet of prawns in the fridge and just grab a few every now and then...with weak tea or water.
rather than try to eat a meal keep it little and often just to get the cycle going again......to much food just come straight back up.
Like you i started with little nap...full of weird dreams and within a week or so you couldnt get me out of bed!!!!!
id take it easy on that bicycle....again little and often.......
Just stuff i remember helped........if it helps yer.......great......
ah yes something else.......with no sleep my eyes would get dry and sore.
optrex works a treat for that.........trucker