Have you started the Lialda yet? Be careful with it. I had a very bad reaction to it- lots of urgency, BMs, blood, and thick hives and bloody scabs all over my body and face. I still have scars from it. I have found that mesalamines make everything worse for me, but I hope that's not the case for you.
What I can recommend is a pureed foods and liquid diet. Even bowel rest with all liquids would be helpful for a few days. I'd take a multivitamin to make sure you get enough nutrients, but maybe the Shakeology has all those? Not sure.
Do you work a physically demanding job or a job away from home? I can't work during flares (I'm not working now) so I'm so sorry you are going through this at work!