Hello again....gallbladder expert here!
As Sparkle said not all gb problems are caused by stones, it can be sludgy bile, inflammation which causes the wall to thicken and therefore not squeeze the bile out so well. A lot of lady gb problems are caused by hormones, it's very common in pregnancy. Hrt does also play a part.
When mine started playing up I drastically cut my fat and then after a massive attack I cut it down to 5-6grms per meal. It's a sliver of avocado, a third of a salmon portion (it's good for you but fat content is high even if you don't eat the skin), a small fillet steak. I still had coffee but always had a small skinny one. I measured out everything to exactly how much yoghurt I could have on my brekki. The massive attack came from a restaurant meal which had some hidden very naughty stuff in it. I had asked the waiter which dish to choose but there was something on the plate which I thought was innocent and turns out not...
See how you go with cutting fat down but it's all fat whether good or bad. I thought I'd be ok with good fats but my gastroman said all fat is fat and cut it out! When we eat fat a hormone is triggered which sets off the digestion process in the duodenum and alterts the gb to get squirting.
Maybe you could try and get an ultrasound to see the state of the gb, it can tell whether the walls are thickened but won't show stones under a certain size. I had one huge one but it got some friends which only showed up on an MRI. If you don't have stones there is another test they can do to measure the gb function.
Trouble is a dodgy gb can affect your overall health so it maybe causing other issues as well. Don't laugh (well you can!) but just before my first attack I started getting an itchy behind (blushes) and went on for months until they removed the offending organ! As soon as it had gone no more itching, I had read it was one of the symptoms!
Hope this info helps but I had an awful 6 months until it came out so I just hope my experience can help others try and prevent an attack. I haven't had kids but a lot of ladies on forums reckon it was worse than childbirth! The funny thing is I had no other indications apart from the attacks other than I found in the months leading up to the first one I felt very sick if I had a big meal or something rich and then of course there was the wine thing but I don't know if that was connected
Emotional upset can also add to the problems. I did look up the gallbladder in Chinese medicine and a lot of what was going on at the time mine started playing up fitted the description!
Let us know how you go with cutting down on the fat.