Hi, Audrey
there is something we call 'magic mouthwash' that will help numb the pain of swallowing - it also includes maalox, which will with constipation due to taking pain meds. Ask about it.
My husband did all of his fluids standing up at the very end - I don't know if it helped physically or mentally, but it did help him.
Sorry, don't know the answer on the vomitin - but I am sure someone will be along that does.
Maria