deedles215 It sounds like your binding is ready to go AS IS. First you try to square up your finished quilt up. cut all 3 edge layers off evenly (top, batting, backing) DO NOT turn under unfinished edge of binding. Just lay it along the TOP with that edge even w/ edge of quilt, right sides together, (It will be sort of upside at this point, and pinning as you put it around the whole edge of quilt. Make sure NOT to catch any of the other folded edge!. Leave at least 2 inches extra at the end for turning under when you get to that point when sewing, so they overlap. Sew these 2 pieces together w/ (with) a 1/4 inch seam. This should insure that when you bring the other edge(already turned under) over to the back side that your pre folded center edge will match the very edge of your quilt sandwich and the very (folded) edge will line up with the edge of the front binding. Or close enough as it won't show. Then by hand take tiny stitches along very edge of back binding to sew it down. Then again, at this point. if you are real "gutsy" just try to match the edge of back binding to edge of already sewn front binding--sew on the machine. Have good luck and have FUN.
imak