Dumb question about portions

You should def contact your surgeon or NUT, as this is important stuff.

It's going to be practically impossible for you to get all your protein in if you only eat 3 meals a day...unless you do protein shakes in between.  So if you're cutting out protein shakes entirely at this early point (and I would be questioning "why" so early because they are an excellent source of protein that's quickly absorbed by your body) you'll probably need to insert two small snacks.  

Personally, I eat 5 times a day to keep my blood sugar stable now that I don't take diabetes meds.  I just make sure that I track all my food and get my protein/carbs for the day.  

my plan was three 1/4c meals each day with 2-3 small snacks.

a small snack was defined as some protein shake or some skim milk.

my protein goal was 65g+ per day.  My calories at that point were usually under 600, then 600-800 by 3m out.