Congratulations on your ds!
I had my ds 8 weeks ago, on time by EMCS.
I felt lots of the things you are feeling too - in fact I felt like I'd been hit by a train for about 3 weeks 
It's all completely normal due to the huge change and all of the hormones.
I too was scared to sleep in case he stopped breathing - it's a very common fear! Gradually I've started to relax and now sleep much better when he does (though I still occassionally lie in bed listening to him breathe
)
You may feel more tearful over the next few days - day 5 was the hardest for me but it should pass soon.
Do you have support at home? A partner? Maybe your mum or a friend can also support you?
Don't be afraid to share your feelings with your midwife either.
I honestly found it really hard at first even though I love my ds to pieces but now I'm alot more confident with him, feel more organised with feeding/changing/dressing/playing and love taking him out and about so I can honestly say it gets easier.
A few weeks ago ds started smiling and now smiles loads which is the best thing. Your little boy will get there too and I promise it's great.
For now, just enjoy the cuddles, don't worry about the housework and be kind to yourself xx