Bless your heart, You have been thru a lot..My CT scans with/without contrast,MRI with/without contrast showed nothing wrong with my gallbladder, i suffered bad for a whole year without help, they finally did a hida scan and that's where they discovered my gallbladder was not emptying completely into my duct, So, they decided to take it out, Good thing they did, It was on the verge of rupturing, it done turned brown in color..the surgeon told my husband I had a diseased gallbladder that needed to come out way before it did.. I didn't have any gallstones. I will say a prayer for you and your surgery coming up 🙏