I had the same problem when I came home. Just had my surgery August 14. I figured out that I wasn't really full, it was gas. The pressure was making it seem as tho I was full. Its very important to get your fluids in. You don't wanna be back in the hospital for dehydration!! Get some gas x strips!! They work wonders and I assure you u will be able to drink much easier. I also found that eating crushed ice is an easy way to get fluids down rather than baby sips. Stay strong! It gets easier everyday!!!! Good luck.