Your hospital should have given you a check list.
But here is something from Cedars Sinai.
Also, I remember they told me to keep warm, and not to exercise the day before, or that day.

Foods allowed:
All meats and poultry.
Hard cheeses.
Nonstarchy vegetables, such as: broccoli, spinach, green beans.
Nuts and unsweetened peanut butter.
Diet soda and zero-calorie drinks. (Be careful to avoid caffeinated and decaffeinated drinks. ...
Tofu.
Eggs.
Oil, margarine, butter.

Best wishes, hope all is clear.