I was diagnosed with them during my first pregnancy, and had my gall bladder out when dd was 4 months old. It was day surgery, but I was told to plan for a day or 2 in hospital in case of complications. I expressed enough milk for the day, and the hospital supplied a pump for me to express while I was in recovery (we poured this out though, as it would contain anesthetic, pumping was to keep up supply.) I went home at about 6pm
I was told before I went in that if bub was exclusively breastfed and I had to stay in over night I could keep her in with me, but every hospital has different rules.
Feeding after the surgery was a bit painful due to incisions in belly button and below, I found the only comfortable way was lying down on my side in bed with dd next to me, so her weight wasn't on my stomach. (not sure if you're breastfeeding though, maybe that's not relevant to you)
The number one thing I would recommend is eating as little fat as possible. I stuck to 3% fat or less for EVERYTHING and this meant I got through to the scheduled surgery, as emergency surgery is more risky and more likely you'll have to stay in.
Good luck and pm me if you want to chat about it.