My program has me on liquids for the first two weeks (8/6 sleeve) with hydration and Protein as top priorities before going to puréed foods for another two weeks and then soft foods. If something isn't agreeing with you, go backwards to the liquid stage and start again until you talk to your doc. Everyone has a different experience and sometimes some of us need to go slower than others. For protein, i have had mix it up due to growing tired of a certain taste. I like to take Greek yogurt, thin it with Water and add a little Crystal Light lemonade mix. By thinning it down, I can tolerate more.