My c/s wasn't painful either. I had an emergency c/s after 6 or 7 hours of labour.
I didn't get up for almost 24 hours afterwards because I still had a catheter and a drip. I was up and about after that, but I was moving slowly and sitting up was difficult, but I wouldn't say painful.
I was given painkillers, but I didn't think I needed them. The midwives said that I would be in pain if I stopped taking them, but I did stop because they were putting me to sleep.
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