DS was 19 months when I had DD1. When he wanted a cuddle (which was all the time because he was still really clingy) I would get down to his level and give him a cuddle that way, instead of bending down and picking him up. For the most part he was happy with that. If he wasn't, I would sorta throw him half over my shoulder, and brace my scar with my other hand, and then slowly get up. It felt pretty normal by 2 weeks later (until my infection took hold and then I was rendered useless again) so hopefully you won't have to feel any frustration for too long.

As for changing nappies - I always change nappies on the floor anyway, so that didn't change. I couldn't get him in and out of the bath, so DH helped me get him in and out, or he went in the shower with me or DH.

I think DH had 2 weeks off to help me out, does your DH have any time off lined up?