Help with diarrhea and keto

I am 80 yrs. old and have been following LCHF since May 14 of this year.  I have Type 2 diabetes, stage 3 CKD (diabetes-related), HBP (diabetes-related) and, 5 yrs. ago, was diagnosed with lymphocytic colitis (non-diabetes-related).  Since May, my A1c has dropped from 7.0 to 5.9, CKD stayed about the same, and Blood pressure has dropped from averaging 140/72 to around 119/64, have lost 33 lbs., and feel better than anytime in the past 20 yrs.  My biggest problem is with the Lymphocytic colitis–chronic diarrhea- and it’s contradiction with the needed fat in LCHF.  The only treatment for the colitis is Budesonide, a corticosteroid.  For the past 9 months I have felt that my body had decided that it had had enough of the steroid; therefore, the steroid has not had the healing effect it did in the beginning.  While LCHF encourages higher fat intake, the recommendation for the colitis is to lower the fat intake.  Thus, the contraindication.  I have not had any Budesonide since October the 10th and it has become necessary to cut way back on my fat intake in order to control the diarrhea even a little bit.  This is a condition that, according to a Gastroenterologist, has no solution because “they” don’t have a cause.  It just IS.  In order to try to control the diarrhea, I went to a clinic and had a food analysis to see if I had any food sensitivities–Yes!–all nightshade veggies, cruciferous veggies, dairy (including ALL cheeses except sheep cheese, which doesn’t melt), mushrooms.  I only eat berries occasionally.  It’s been really difficult to find Keto foods to eat that don’t contain the “bad” foods.  My chronic condition also doesn’t allow a lot of fiber or raw foods.  I’m wondering what your take is on this problem.  I realize you don’t diagnose, but maybe you have an idea or two as to how to deal with this.  I’d sure appreciate it.  I refuse to go back to eating a lot of carbs (as recommended by a Nephrologist) and feel the way I have felt for so many, many years.