I had the same surgery with the same cuts, and the belly button
one is actually the worst. It's not at your belly button
.... it's IN your belly button! The first day or so, you're only going to wake up, eat, and fall asleep. It's mainly ache and soreness, not active pain. Your belly will be swollen, and you're going to want soft shorts or sleep pants or something. You won't really be able to bend, either. Don't even attempt stairs for the first two or so days... you won't be able to do it.