Hi Lark,
I was in the same position. Returning to a highly demanding job, 12hr shifts, encompassing both sitting a a computer, walking/moving and high stress, I was exhausted. I had many fears, would I manage, would I be able to eat and drink? I decided to go back after 4wks as I needed to get over that hurdle.
it was tough, I work nights and days, so going back for 3nights after a month of sleeping 9hrs per night was daunting. I managed, pre-planning involved making up a box of protein drinks, 25-50g tubs of snacks, and high protein non perishables and putting it in my locker.
My fluid intake was planned out, 3 x500ml bottles of water, 1x protein shake. A couple protein balls in my pocket, lentil soup for my 1am break. I think I did around 12k steps that night. So yeah come morning I was shattered.
since that block of nights, I’ve also been on days, which I always struggle with anyway. There was an added problem this time, of slight reflux in the morning, which was new to me. I found a few dry crackers (10g) in my pocket helped. I can drink when sitting at my computer and if o have to run to my locker for a 5min time out and a snack I can do so.
the swap from days to nights and vice versa is not easy. I am considering asking for only days for the time being, which has financial implications but might be better for my health. Do what’s right for you. I wanted returning to work over with, so I’d not worry about it. This process has been one of trial and error for me.
Good luck. I wish you well o your road to health. X