Latest measurements suggest that the X(3872) mass lies less than 200 keV away from the D 0D0 * threshold, reenforcing its interpretation as a loosely-bound mesonic molecule. This observation implies that in processes like D 0D0 π 0 production, threshold effects could disguise the actual pole position of the X(3872). We propose a new effective field theory with D 0 ,D 0 and π 0 degrees of freedom for the X(3872), considering Galilean invariance to be an exact symmetry. The D 0 * enters as a D 0 π 0 p-wave resonance, allowing for a comprehensive study of the influence of pion interactions on the X(3872) width. We calculate relations between the mass of the X(3872), its width, and its line shape in D 0D0 π 0 production up to next-to-leading order. Our results provide a tool for the extraction of the X(3872) pole position from the experimental data near threshold.