I am in my sister's wedding on saturday. I just picked up my dress from being altered today. I tried it on again when I got home to be sure it fit right. When I zipped it up the little clousre on top broke. So now there is a gap at the top of the zipper. You can't notice it very much but I am now afraid that it will slowly unzip itself throughout the day without my knowing it. I don't know how to sew and I don't know anybody else that does. Is there anything I can do to fix this without sewing knowledge?