Good idea to call postnatal ward (not labour ward....) and ask about this.
Some babies are a little slow on the first day, and your lovely baby is not even 12 hours old....so too soon to be concerned IMO, especially as she has already shown she can feed well
Keep her skin to skin, not sleeping away from you, and if she continues to stay asleep for another hour or so, you can hand express colostrum and give it to her on a spoon, drop by drop into her mouth....but do check with the ward before you do anything. You may be able to get a midwife visit tonight which should also help.
Well she's still barely opened her eyes but has stopped bringing up mucus and had her first poo
she also fed non-stop for 7 hours last night, literally one side and then the other, even co-sleeping I only managed to get 2 hours sleep! She's fed on and off all morning as well. I think it's safe to say this girl likes milk! I needn't have worried but 5 hours without waking/wanting a feed seems a lot for me - DS never went more than 1.5 hours until he was about 9 months old!
My 8 day old had similar on day 2 (we were in hospital for a week). I couldn't wake him at times & he wasn't interested in the boob. I hand expressed & fed him colostrum by syringe twice & he had 10ml of formula by cup & this was enough to give him his strength back. I was beside myself thinking he would dehydrate/ starve but now his problem is guzzling too much milk!
These first few weeks seem like a feeding minefield.