Hi Liz
Not sure how helpful I can be but I had my gallbladder out 10 years ago and never really had any problems since other than when I went really OTT on eating fatty foods. I wouldn’t have thought the amount of fat you eat on the 800 would be a problem but everyone is different.
I’m not sure how related to the diet the gallstones would be after just 5 weeks. Mine came on suddenly with one nutmeg size stone suddenly blocking the bile duck. However I have heard of people developing gallstones when they lose a vast amount of weight very quickly such as after weight loss surgery.
Having suffered the pain and the surgery I don’t blame you for being cautious I would ask your Dr for advice
Good luck with it you have my sympathy!
Ps I was told the diagnosis was fat female fair and 40 ….not flattering but true in my case! Hopefully not for too much longer the fat anyway.