txchick is right. You won't feel hungry probably. Eating 3 times a day is totally fine but you should suppliment with a protein drink. The lightheaded is probably a combination of lack of protein AND dehydration. You really need to be pushing both right now especially since you have gone back to work. If you can see if you can work 1/2 days or one day on and one day off until you get more energy. It will be a few weeks until you're completely healed. GBP is MAJOR surgery and your body is a lil freaked out right now. Give it a lil time and you'll be feeling better probably between 5-7 weeks.
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