Hi Googley,
I'm sorry about your professors - how rude!
Trying to accommodate changes in diet is hard, especially when they're so all-encompassing like celiac disease!
Accepting a new diagnosis is HARD. No doubt about it, we can cycle through the stages ninetybillion times and then again... It does get easier though.

As for your favourite foods, can you ask a nutritionist for perhaps an alternative (we have made advances in types of food you can eat in lieu of those containing gluten) that is similar that won't cause you any problems?