I don't know about questions, just wish I had been paying a little closer attention to the warnings to better prepare myself. I have had multiple surgeries throughout my life with no complications. This one landed me in ICU, leaving me moaning "Why did I do this to myself?". Don't get me wrong, I should have done it years ago, and would do it in a heartbeat again even knowing things could be miserable as heck at first.
That being said, everyone that I knew that had bypass asked that same question afterwards. They didn't tell me that beforehand. But I got all my misery out of the way right out of the gate, and have had zero problems eating, drinking or otherwise (actually wish I had a few more problems eating

!)
You will see alot of people fresh out of surgery and going in with problems/complaints...but they are usually only temporary and fade away fast, so don't let that discourage you.
Good Luck!