Gallbladder Inflammation can be very serious, besides being very painful, trust me I've been there. It can lead to other issues, and you could end up in an even worse state and have to spend longer in hospital in a while if you discharge now.
The thing is if its been caused by gallstones, and you need it removed that is normally only a day case. If you let it get really inflamed, they can't operate, well they won't unless its life or death, and then its a full surgery rather than keyhole. The pain will get worse and you end up in and out of A&E and assessment units.
So it maybe that putting up with it tonight, getting the antibiotics started, and then a quick daycase in a few weeks or so will mean less time away from your LO, or maybe you'll be one of the people who once the inflammation settles down you're not bothered by stone pain for a few years plus.
Short term pain for long term gain??
Oh and people deal with pain in different ways, some use distraction, like chatting. Some want to be left alone, everyone is different, pain is what the patient says it is.