Re-test for Positive IBD Panel?

I was dx'd in 2006 by GI #2 (after GI #1 did a EGD/Colonoscopy and found gastroparesis but couldn't explain my 21 bms each day). First I had positive identification from the pill-cam suggesting early Crohn's in my jejunum. We then did Prometheus IBD First-Step which came back with 86% PPV suggestive of Crohn's (elevated IgG). Then came the next colonoscopy (3 months after the first which was clear) that showed linear ulcerations throughout the ascending colon, along with biopsies with "mild, patchy, active colitis". At that time, and since, all blood and stool work were totally normal.
I am currently on Imuran, Humira (weekly), and Entocort and have been for the last 2 years. For the last 6 months I have had 5-12 bms daily, moderate abdominal pain, rectal bleeding, fevers, and joint pain. Along with wonky rashes.
My current GI (#3), who I have been with for 7 years and who I have a very good relationship with (though he has ADHD and isn't very thorough), ordered another pill-cam last month. The results are in and it showed erosion in the small intestine but he doesn't think that is causing my symptoms. He has ordered for me to retake the IBD First-Step as he now questions if I truly have Crohn's. I am devastated. Has anyone else had to re-take a positive IBD panel? Any advice or insight would be a great comfort.

Best,
M.

Thank you so much for your response, Dave. I agree with everything that you said. It would make sense that my current Dr hasn't seen any disease activity because I'm on so much medication and maybe something else is causing the symptoms. But to totally question the Dx after all these years, just, well, it's quite honestly earth shattering for me. And I could understand if it was just the Prometheus test that had dx'd me, or if he was questioning a false negative like you had. But to have other positive tests and to have the Prometheus be positive...I don't get it.
Plus, I guess what really bothers me is how my Dx can be questioned without the dr explaining it to me. His nurse acted like I was absurd for being upset that he is questioning it. I would really like for him to explain it to me as this is terrifying.
I'm going to send my records to an IBD specialist to have them review all of my past records before I do anything else. I'm pretty scared, but I don't know what else to do.

I think that's the best advice that I've gotten in a really long time, Dave. Thank you so much! You are absolutely right, and after all that we go through, we can't let someone who isn't invested in our health have an impact on it. I sincerely appreciate your help!
-M.