Hi Nycole!
I developed bile acid malabsorption after a complicated Appendix surgery which resulted in removal of part of my small intestine among other things. The lower portion of the small intestine is where your digestive bile is reabsorbed, so when that gets removed the unabsorbed bile goes into the large intestine and causes the loose stool.
My Surgeon was not very helpful with the loose stool issue, they recommended Citracell, which I had to take an enormous amount of and which also has the side effect of disturbing the mucous layer in your small intestine which is where your digestive bacteria live; when it gets thinned out enough you get leaky gut and digestive sensitivities to foods that use to digest well.
My primary care physician checked with a gastroenterologist and told me I had bile acid malabsorption. She suggested I try Cholestryamine, a bile acid sequestrant, which worked dangerously well. It made me so constipated it was scary. I finally figured out that calcium carbonate is constipating for me. I also take magnesium glycinate instead of citrate as the citrate encourages loose stool and through trial and error I found some probiotics that firm up my stool (SFI Health Ther-Biotic Synbiotic).
I think bile acid malbsorption if pretty common among people who have a portion of the small intestine surgically removed and am surprised you have run into physicians who are clueless. Every gastroenterologist should be aware of this issue.
With the removal of your gall bladder you are overproducing bile acid so would have a more severe problem than I am experiencing. I have read that for some fortunate people the bile acid problem resolves over time, hope you are one of the lucky ones!!