If you want to learn if you have celiac, 2 weeks of eating gluten is not enough. The usual mention is several weeks, even up to 3 months. Otherwise, tests show up negative if you have been eating gluten free.
That's why it is important to take a celiac test before going gluten free. It is very hard to decide to retake gluten after feeling better without it. Many practiconers say 'try eating gluten free' and not first offer to give a celiac test. So sad after all that is known about celiac.
When I was diagnosed with celiac, I also was diagnosed with microscopic colitis.