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Has anyone ever noticed any trouble with asparagus?

I kept thinking that I was accidently ingesting gluten from something
else when I got sick from meals that included asparagus.  Then one day I
ate asparagus by itself, and presto! I got sick.  I've tested it twice
since then, and it definitely gives me CD like symptoms.

Then I noticed that the tips of asparagus look just like a grain, and the
tips are my favorite part--of course.  My encyclopedia doesn't have
anything in it for asparagus.  Is is a grass or grain or what?
Can anyone shed some light on this?