Endoscopy results

Hi guys! I did my endoscopy!! It wasn't half as bad as I thought it would be !! However, everything looked absolutely fine but of course they still took the biopsys.

I had a positive Endomysial antibody IgA test (a positive serum tTG) How likely is it my biopsy will come back negative for coeliac? I have been referred to the coeliac clinic already before my biopsys which as confused me because my biopsys may be negative and I'm not coeliac?

Thank you!