I had a 10.5 hour operation and a 15 day stay in hospital (including ICU immediately afterwards). To be honest I was high as a kite on the drugs and slept most of the first few days.
The only time I ever felt discomfort was when they took me for an MRI the day afterwards but it wasn’t painful as such, just uncomfortable.
I honestly can’t remember the first few days afterwards and only snippets from being on the ward.
My best advice is just take each day by day and have a positive outlook. There’s a reason you need the surgery. Your recovery might be slow but there will be an improvement each day, even if it’s small.
Also, talk through any concerns you might have with both the surgeon and anaesthetist. Mine was that I would wake up in pain - they took it on board and made sure I was dosed up before they bought me round and checked regularly on pain levels.
After major surgery too you tend to be on more specialist wards with higher levels of staff. Even better if you’re at a teaching hospital as you have lots of people on work experience as extra hands.
My experience was REALLY positive. The only downside was the physio I needed afterwards was poor so I ended up paying for some privately. The physio in the hospital was great in making sure I go do everything to get home but was left a bit in the dark after that.