İ have switched coffe with water after a heavy digestive system illness, an ulcer, more scary one than the one at stomach. Water is the way to get healed generally, physical and mental. I suggest you to start your day with water and continue. However, waiting for that you will share how it will has gone with that caffeineless one :)
I drink 3 litres of water a day, every day. One of my medications makes me very thirsty and so I have to consume that much. I love water. I'm not about to swap out coffee completely though, I enjoy it. If I was told it was required for medical reasons then I would though.
Thanks for your comment.