Short version: I had my gallbladder removed. Diarrhea for a year now. I have tried a bunch of things to stop the diarrhea (some independently and some with my main doctor). I want to try a bile acid medication like cholestyramine. What kind of specialist should I be consulting? A gastroenterologist? Some other specialty?

Long version:
* I had always had the ability to digest anything. Almost never had an upset stomach.
* I started having a complete loss of appetite some evenings, occasional queasiness, and diarrhea a couple times a week. A scan showed I had gallstones.
* I had my gallbladder removed in March of 2021. So it's been a year since surgery.
* After the surgery things got worse and stayed worse. I’ve had daily diarrhea unless I was constantly taking loperamide and/or Pepto Bismol (and sometimes I’ve had diarrhea even though I was taking anti diarrhea medication).
* I found a daily level of loperamide that made me regular, but at that dosage the side effects were too much. I dropped the loperamide dosage to what I could tolerate, and it’s not enough but helps.
* Tried eating very low fat. Did not help.
* Tried smaller servings, did not help.
* Tried eliminating caffeine. That may have made a very tiny difference, but barely enough to notice.
* My doctor had me try citrucel fiber. Just made my daily diarrhea start earlier in the day with more urgency.
* My doctor had me try hyoscyamine ER 0.375 mg 2x a day. That was awful. Much worse diarrhea and lots of side effects.