Typical laminate flooring should have 1/3 to 1/2 inch space around all perimeters. (Please tell me you didn't butt the opposite edge hard against the wall). Sounds like you'll have to cut the final course to fit. A simple job, really, but be sure to use a fine toothed saw or circular saw blade as well as run a course of common masking tape over the area you intend to cut, which will keep it from splintering... Best of luck!