After I tied off the mains, the last string on the mains seemed to be extremely loose and not tensioned. IT was too late for me to go back, so I finished the rest of the racket. That loose string seems better than it was, but it is still noticibly looser than the rest of the strings. is this a big deal? will this string hurt my shot when I swing at that spot or is it ok? please respond asap. thanks.