Someone new on here mentioned that her doctor might just remove her gall stones, but I had never heard of that before, nor do I know how they can even accomplish it. Normally any surgery performed is to remove the gall bladder entirely. But your doctor/surgeon should have made that crystal clear to you from the beginning. Shame on him.
I don't know if Canada and its NHS has any rules about surgeries and hospital stays, but in the US, this is an outpatient procedure, which means you are never admitted to the hospital and you don't stay the night. I went in for my surgery at 6 in the morning, or so, and was out by early afternoon. The surgery itself only lasted an hour or an hour and a half, but it took me a few hours to sleep off the anastesia.
You will need 6-8 weeks to full recover from the surgery. While the pain should be gone in a week or less, it will take 6-8 weeks for your body to adjust to not having a gall bladder. This usually means a lot of diarrhea, and a very small food palate, consisting of a lot of low fat, bland foods, and little, if any, meat. After 6-8 weeks are over, what you are left with is pretty much what you can expect for the rest of your life. You can find out then what you can and cannot eat (and what you can't eat then will pretty much be something you can never eat again), and you will figure out how bad your symptoms are. The vast majority of people who have their gall bladders removed either develop acid reflux or diarrhea, or both. Some may experience constipation. Some people have these problems every great once in a while, while some people have terrible problems every single day. But once you are finished with the adjustment period, then you will know what it's going to be like from here on out, and you can medicate as needed. But during that adjustment phase, anything's possible. For instance, pork and beef both gave me diarrhea during that period, but after I adjusted, I was able to eat them again normally. Caffeine, however, has never been something I have been able to go back on (I had to get off it when my gall bladder was still in because it made it worse even then). As I said, keep it bland, low-fat, and only chicken and fish until 6 weeks have passed, then start adding stuff back into your diet to see what does and doesn't make your symptoms worse.
Be sure to come back here when you are adjusted to get recommendations on meds to take or things to do to help whatever symptoms you wind up having permanently.