Hi Greg, welcome to KA.
That is a truly awful and sad result to have MS after 4 years on a biologic. I'm so sorry that you're suffering this, along with your AS coming back on full-blown after stopping Enbrel.
Really good news that you found you can control your AS pain and symptoms through the no-starch diet. I really hope that there is a chance your MS symptoms might go back into hiding, with the withdrawal of the med.
Take good care,
mig