It makes sense to look back at your test results from the original celiac disease diagnosis. But any tests you are doing now for celiac disease will automatically be negative since you have been gluten-free for a while. The only way to get good celiac testing for now would be for you to do a gluten challenge for some period of time. The whole point of the gluten-free diet is to eliminate the blood antibodies and villi damage, so it could be said it worked in your case!
But, that doesn't mean you don't have Crohn's or some other condition. It is possible to have more than one GI condition at once. My brother had both Crohns and celiac disease.
If you read up on a Crohn's forum you will find that some Crohnies do well on a gluten-free diet, and others don't see any improvement. It's a variable thing for them.