My daughter had inconclusive blood test but positve biopsy. GI said definite celiac, even explained that is why he did the biopsy - because she was symptomatic. The biopsy was diagnostic.
As for symptoms, the intestine takes months to heal...and good suggestion re: dairy - it can be diffcult to digest in many celiacs.
Both my children are celiac and they both had "remission" followed by symptoms for the first 3 months - GI even forewarned us about that and said: as the intestine heals, the body readjusts and is absorbing different. Plus all the "loose enzymes" that were absorbed through the leaky gut have to be eliminated from the body. We were told to be patient and that it could take 2 - 6 months.
Think of it this way: when you get a road rash on your knee from landing on gravel - it feels bad initially, then not so bad, and then as the new tender skin has replaced the damaged skin.....its sensitive to touch and more easily damaged until it heals totally. The intestine is no different -it is layers of epithelial cells regenerating and takes time to be "normal".
The symptoms you are experiencing doesnt mean you are not celiac.... the biopsy says you are!
They may be related to dairy or simply the early stages of a healing gut. Your small intestine is several feet long - thats a lot of regeneration.
Hope this helps. 2 weeks is just barely time for the villi to have started regenerating - damaged intestine has trouble with lots of foods of any source, even too much watermelon can do it. In other words, even totally gluten free - you will get GI symptoms in the early part of the diet. Plus your body is adjusting to a different variety of foods on top of healing.