YES! least is correct. For the first couple of days I was a huge emotion ball and being a guy this caught me off guard haha.
We've used booze (or whatever your choice of poison is) as a tool to blank our brains. Without the booze, the brain is re-connecting old circuits and during this rebuild things may come up. Don't fear them, learn to understand them and if need be, fix them.
As each day passes, you will feel better. Just be kind to yourself, embrace the emotions that you may be feeling. One day at a time and you'll be AOK!