Raju,
Welcome to the forum.
Glad the doc helped your UC.
Sorry you now are dealing with: Ankylosing Spondylitis.
IMO, you should check into: LDN, low dose naltrexone.
It has put people with UC in remission (myself included), but more importantly for you, it also helps those with Ankylosing Spondylitis.
LDN is not a big pharma drug, as it's been around since the 1980's and in fact big pharma doesn't make it, and it's got almost no side effects at all.