I am a new person at 51

So I was diagnosed with crohns 16 years ago. I was on a medication and it helped. However I felt I was wrongly diagnosed. So I stopped taking meds. Now I am active and it is in my illeum small bowel and I can't keep iron or vitamin d. So I got rechecked. They want to start me on stelara. Will this work? I have no idea. Any help?