Years back after two years of a series of initial severe attacks and rounds of high dose pred incl two hospitalizations with IV pred, my severe pancolitis (not sure what it started as, because it was 6 months of on and off bloody D before it got diagnosed), my UC went into a full 9 year remission without any symptoms. Just wanted to point out that the rapidity of the progression doesn't mean it can't recede as dramatically too, so don't lose hope.
Pancolitis dx'd 1986, full med-free remission 88-97
Flaring or simmering ever since
10 20 17.5 15 12.5 mg pred, 100 mg Imuran
Probiotics (Primal Defense and others), TSO
Turmeric/circumin, fish oil, many vits/minerals
Lower-carb version of Specific Carb Diet (SCD)