Hi,
Don't be discouraged. When I had by banding I felt a little emotional too. Be careful with physical exercise at first. My main goal after surgery was to heal first. The issue with not feeling hungry at first went away as I started to heal and the swelling went down. soon my appetite returned. Listen to your body. Most of what you describe is similar to what I experienced and felt. Bruises will go away in a few days, if you typically heal well. Best Wishes.