I already signed for a position in the Navy that requires a TS/SCI clearance but my recruiter told me to not disclose my cashew allergy and I'm afraid my medical records will be checked. I really don't want to screw up my future over something stupid and I wish I could just redo the entire reenlisting process...Will I be booted from the Navy if/when they figure out? Do they check for this sort of thing even?

What should I do to fix this?