Steroids Not Slowing Mouth Sores

Hello,
2024 learned I had BP’s on my legs. Spent the 1:2 a year on Steroids and battled them into remission by October.
All the while, my mouth was showing signs.
Fast forward and it has been 2 weeks since being seen at OHSU. I have been put on 60mg Steroids for two weeks, 50mg for 2 weeks, then 3, etc…
I started Mycophenolat also 2 weeks ago. It takes 3 months to kill my immune system. Yay.
Anyone not get a good response when being hit this hard with Steroids? 60mg a day protocol sure took care of my legs, but my mouth is MESSED up!
Peace