Sweetheart given how the birth has come about - emotionally AND medically (4 hours is bloody fast!) - it's ENTIRELY possible you're in shock - again emotionally AND medically.
Genuine questions - did you lose a lot of blood? are they doing fairly frequent obs on you? Pulse, oxygen, bp etc? Are you drinking plenty? Being encouraged to?
If you're still awake then PLEASE buzz and TELL someone that you're feeling "off" possibly dissociative (if you can't pronounce or don't feel comfortable saying that - I'd struggle this time of night) then say "distanced" or "out of the world"
This COULD just be emotional/hormonal but there's a small chance it could also be symptomatic of other MEDICAL issues so I wouldn't be happy not telling you to do that.
I'm sure you're being monitored as I suspect that's partly why they've kept you in.
On the emotional side as pp say it's entirely normal to feel as you do. Few women feel all "loved up" with baby immediately after birth - we're too sodding knackered apart from anything else 😂
I had the opposite "shock" to you if you like in that dd got too damn comfy! Especially as I thought I'd be like my mum - all 3 of us were early (even my bro who's never bloody early for anything was 2 weeks early! Made him the "latest" of the three - I was 6 weeks early, sister was 5 weeks and then bro at 2 weeks) so I spent my whole pregnancy kinda assuming I'd deliver early too.
Nope!! 3 days of attempted induction, 28 hours of labour ending in emcs. We both almost died. Little bugger 😂 (not so little now but still a bugger! She's 6' nearly 18 and just strolled in from a night out with the boyfriend and woke me to borrow something!).
In the first 12 hours after I had her I wasn't even conscious to hold her! She was in scbu anyway. But even the next few days I struggled to connect her to the bump I'd grown attached to.
She's a little stranger at the moment, you don't know each other properly yet, the more you get to know each other the closer you'll become.
Babies don't do what we want them to unfortunately, I also planned to be a carefree, routineless mum - and ended up with a baby that demanded routine and strongly protested if it were disrupted.
It's hard but you kinda need to try and resist the urge to have expectations.