I Just Came Home For An Emeergency Appendectomy,mine Was Very

i just came home for an emeergency appendectomy,mine was very severe,had black spots which they said was the beginning of gangerine,,i have a high tolerance for pain so i didn't know they burst and i waited 3 days after my first symptoms sickness,fever,chills thought it was the flu...now all said and done is there side effects i should watch for to share with family and freinds with high tolerance pain levels