My tests regarding also came back negative, but I'm still gluten intolerant. As far as I can tell, these tests only check for coeliac disease. I used to be able to eat little amounts of gluten though and am still okay with trace amounts, so it's not all or nothing.
With dairy, I feel you! I have completely given up on dairy milk since it doesn't work for me, even the lactose-free options. I currently love rice milk and coconut milk as a replacement. Almond milk as well but I can't have too much of it.
I've recently seen a nutritionist and she recommended that I pay attention to eating slowly, chewing well and also not drinking too much during meals. This actually helped a lot with bloating, too.
Wishing you quick relief, Karina (team member)