Be sure to check your vitamins, toothpaste, mouthwash, shampoo, etc. If you can make it to a nutritionist who KNOWS Celiac, do so.
Many Celiacs don't make it to college. I think of all my experiences there while not understanding why I was always sick or having accidents. oy! A counselor told me to turn each negative I said about myself into two positives i.e. instead of berating myself for being late to class, acknowledge myself for GOING to class or even for being at school at all.
I don't think you're experiencing anything all of us haven't gone through at some point. Don't be too hard on yourself. Most of us would never talk to a friend the way we talk to ourselves. Learning to treat ourselves with compassion is a lifelong journey.
Keep your chin up and congratulations on your schooling. You may have to work harder but you are stronger for it. Remember that because it's true even if you don't yet realize it. Hang in there.