Is the mirror superstition real?!?

today i was at a school basketball game and me and my friend went to the bathroom, the bathroom we went into is like the crappiest in the school and doesnt have a mirror, it just has like a crappy mirror someone once brought in there. she wanted to see how her outfit looks so she asked me to hold it and as i was holding it i suddenly felt something wet and sticky and i accidentaly dropped it cuz i had no idea what it was. she then freaked me out and said i have 7 years of bad luck. i never really believed in this stuff but im SCARED OUT FO MY MIND. i read to undo it you need to burry the broken pieces in the ground, but the janitors probably cleaned it. please am i really guna have bad luck and is there proof of this bad luck????