Can you get prednisone? Wouldn't normally recommend switching to that, but you can get much smaller doses with pred than you can with budesonide - the smallest dose pill is 1mg. Maybe you could switch to e.g. 10mg pred and taper down by 1mg or even 0.5mg (cut the pill in half) at a time. (Don't try cutting Budesonide in half though, as I'm pretty sure that's extended release - ER meds usually come in a special coating and are designed to be swallowed whole.)
It is possible to come off steroids after being on them for years, but you need to go very slowly. Trying to do it in a few weeks won't work.
Dx Crohn's in June 2000. (Yay )
Tried: 5-ASAs, azathioprine, 6MP, Remicade, methotrexate, Humira, diets.
1st surgery 20/2/13 - subtotal colectomy with end ileostomy.
2nd surgery 10/7/15 - ileorectal anastomosis. Stoma reversed and ileum connected to the rectum.
Current status: Chronic flare. Do I have any other kind?
Current meds: 50mg 6MP; Entyvio (started 3/11/16)