Hi Doctor, I Had My Gallblader And Umbelical Hernia Surgery

Hi Doctor, I had my Gallblader and umbelical hernia surgery four days back ,on first day of my surgery in the evening when I go to paas urine I found white discharge .i am 58 yrs old in last ten yrs I never had white discharge and now I don't have white discharge than why the one day it had .i am worried what is the reason can you please tell me.is that because of enisthisia they gave me.