I had my first baby via emergency c-sect in Feb and had the excruciating pain like you described several days later..I wasn't given any pain relief on day 2 due to a bad experience with a middy, but that's another story I found laying on my side and holding my wound whenever I was using my core muscles eg.getting out of bed and off toilet etc helped alot. It was horrible because DS was in the special care nursery and all day and night I had to hobble down there holding myself (the pain was indescrible). I went home a week after my c-sect and still needed some pain relief at times. Take is easy and don't deny yourself pain relief as you're going to need all your energy to look after your LO. Hope you feel better soon xx