Congrats, blondecat! I remember I had pain around the site of my canula weeks/months after my CS. Not sure if it was related, but will take your tip if another CS.
Hope feeding improves. Keep DS with you (skin to skin, blah, blah) as much as you can. I found lying down much much easier in the first few hours/days. Not a lot of room in those beds, but whatever way you can feed comfortably, do it. Definitely push for help at hospital (assume you're there for a couple days) and if they aren't doing enough then umf is right - phone BF counsellor or LLL.
Umf, that's so funny you said that about labour signs. At my MW appt today the MW gave me a sheet on how to recognise the signs of labour. She asked if I wanted it 2nd time around and I said yes, of course! I think it's only natural to forget what happened 1st time. Especially early labour.
Slings: we used a baby bjorn for a bit with DS, but then I bought the Ergo when he was about 4 months old. Brilliant carrier for both partners to use and esp good if you have a bad back. I've bought the infant insert for this baby, so plan to use it again from newborn.