Can I assume your celiac diagnosis came from an upper endoscopy with biopsy of the duodenum?
When you say a repeat EGD does not show celiac but shows lymphocytic colitis, do you mean you had an upper endoscopy and a colonoscopy? What exactly was found in the colonoscopy biopsies? Do you have a copy of that report?
Being positive for ASCA IgG and IgA signals to me only a small concern for Crohn's. By themselves, those two markers aren't highly specific for Crohn's disease. The blood test done by Prometheus labs uses the two ASCAs plus two other antibodies to bacteria, plus a couple of inflammatory markers, plus a couple of genetic mutations, plus a couple of other autoantibodies - and with all that, it's still only maybe 90% accurate for determining whether or not a person has Crohn's.