This may not be what you want to hear at the moment, but I'll let you know anyway just so the thought process goes there a bit.
Anyway, I had UC for about 8 years and tried one of each type of pill, suppository, and biologic. None worked for me except Entyvio and for only a short time. If anything I turned out to be the poster child of "in the unlikely event of this side effect…".
Long story short and the part you may not like: I had a total proctocolectomy with permanent ileostomy done in 2017. I will tell you that this easily one of the BEST decisions of my life. I will not lie to you that it isnt the most pleasant initially, but once you settle into a routine and figure out how and what to eat you will be in a much better place.
In the four years since my procedure I am more healthy than I had been in years. I went from terrified to be out of sight of a bathroom to training for a half marathon. I have gotten to the point that I change my appliance about 3 or 4 times a month, I take NO meds (I do take a multivitamin, B complex and iron) and eat almost anything I want.
If that becomes a topic you need to explore i would be more than happy to tell you more of my story and let you in on a bunch of stuff to do beforehand to make "bag life" easier. Respond here or PM me.