It is quite normal because all you are taking in is liquids. It will return to normal when your diet changes... then you have to deal with not going as often as you did prior to surgery.
I'm 6 days out and didn't feel like myself till a few days ago. The nausea is most likely related to the anes. It gets better. I didn't take any pain pills after day 2, couldn't deal with the taste of the crushed pills. That makes me want to vomit... god help me when I have to deal with all the vitamins.