Butterfly,
Welcome to the forum.
It's great that you were able to achieve remission for so long, sorry you're now experiencing a flare.
I agree with IAS, for many of us, there are a variety of things that work in combination:
diet modification as in going gluten and dairy free, adding certain supplements like probiotics, slippery elm, L-Glutamine, and then LDN, low dose naltrexone.
By all means keep on with the meds, and I hope they'll start relieving your symptoms, but the prednisone may be having some temporary effect as well.
If you are interested, there are things IMO that you can control, which will have a direct impact on
your disease, the symptoms you experience and their severity.
I was able to control my UC into remission through various
supplements, probiotics, diet modification, and LDN , low dose
naltrexone.
For more info on the protocol which has put me into remission,
please go to this link: https://www.healingwell.com/community/default.aspx?f=38&m=1666318 , and look at the 11th post.
I hope you feel better and let us know how we can help
you.