Usually about a week to get the test results back. I'd be surprised if it was any longer than that.
It is possible to have gluten sensitivity causing bad symptoms without testing positive for celiac disease, but it is good to have those tests run.
A fair amount of people with gluten sensitivity/celiac disease also have problems with cow's milk. Lactose intolerance can be temporary, and sometimes successfully added back in. You can also have casein intolerance (the protein part of the milk), and that is usually with you for the long haul.
The sensitivity of antibodies to casein, beta-lactoglobulin, and ovalbumin in active coeliac disease varied from 36% to 48% without significant difference between IgG and IgA antibodies.
Antibodies to dietary antigens in coeliac disease. PMID: 3775259 Oct !986
Cara