I would definitly try to work more protein into your diet.
You can add FF Plain Greek yogurt into soups for a real boost.
Lowfat flavored yogurt will help also.
This is the part of the surgery Drs don't talk a lot about " Bandster Hell", the time between surgery and restriction, when you want to chew your arm off. Hang in there, it does get easier and better.
I remember feeling really pretty well ths first week post op, but the second week brought on great fatigue. Good thing, it didn't last long.
Your body has suffered a shock, it needs time to regroup. Don't push it.
Good Luck