I had similar surgery (initial cancer was in my sigmoid colon and had partially attached to the cecum. I had initial surgery 5/6/19, and then another on 5/16/19 due to a leak at the anastomoses site. I had a wound vac for around 4-5 weeks and initially pain was rough. It takes months to feel better. But if you are having so much nausea I would contact your oncologist. Are you still doing chemo? I did chemo after surgery but only made it two rounds. Too much diarrhea and I wound up needing a surgery for an obstruction caused by adhesions. That was in August 2019. I developed a fistula in September and 19 and ultimately that led to a perforation requiring emergency surgery on 11/6/19. I developed sepsis and was on a ventilator for 9 days and in the hospital for 5 weeks. I was no food or liquid by mouth until end of December. I was on TPN while I healed from another Leak.
I had four prior abdominal surgeries (all open surgeries) prior to the sigmoid resection and it made healing more difficult. I had three inguinal her repairs and the mesh has been an issue with both my sigmoid resection and all other surgeries. I’m still not “normal” and have tons of gas and bloating when I eat. My tummy is still swollen and distended. I think it takes a long time to heal. I don’t feel like my surgeon really told me what to expect in the future. I think they just deal with the surgical aspect not long term. I hope you get some relief.