Awww I'm sorry you are sick again! That stinks. I can totally relate though! I hate when I get a stomach bug and I can lose like 3lbs in a few days. Takes me weeks to gain it back! I was just on a IBS flare up like you for a couple weeks. Just couln't shake it. All my clothes were getting too big and I just felt like blahhhh!
I guess I have to look into the Ensure and see what the ingredients are in it. Maybe they make a lactose free one or something. Was it good tasting? I remember when I could tolerate milk and drank those carnation instant breakfasts and they were good. I'm just not a fan of milk and never really was.
Now the sugar cookies sound like a plan! Hope you are feeling better real soon and that weight stays on ya!