If you are on Entocort, then you are already on a steroid. How long have you been on the Entocort? The Pentasa? Daily doses of each?
(The full dose of Entocort is 9 mg, and the most effective dose of Pentasa is 1 gram, 4 times a day.)
If you have been on them for months and they haven't helped so far, then they are probably not going to work for you.
Unless you are willing to try unconventional therapy like LDN, you might need a short course of prednisone to nip the inflammation in the bud and then buy you time while more effective meds, like azathioprine, kick in.
It's not correct to say, flat out, that steroids (Entocort, for instance) do not cause healing, because not a single published clinical trial has proven this. The best we can say is that we don't know whether a steroid like Entocort can cause healing because no clinical trial has proven that it does. And it is certainly fair to say many of us suspect it doesn't. It is also not correct to say, definitively, about steroids that "they only mask symptoms." For instance, a steroid does not just mask inflammation - it can reduce or eliminate it. But does it stop Crohn's dead in its tracks. We don't know, for sure, but many of us suspect it doesn't.
Azathioprine, on the other hand, HAS been proven to cause healing.