Aura, there are enough frum people on the Crohn’s diet (don’t know what’s up with you, but I know a little about SCD) that this is not an alien concept. You can drop that you have a rav you ask these shailos of, e.g. what you have to do on Pesach, to allay any concerns that you’re not aware of the ramifications. If you don’t have such a rav, find one.
To whomever else it may concern, good suggestions with lower gluten grains, but there are some diets that preclude ALL grains.