I was eating lunch at school and a girl came out asked if I had snapchat. I said no and she ran back inside. A different girl came out a minute later and said "Since you dont got snapchat can I have your number" gave it to her and before I could tell her my name or anything else she ran inside. Its been a few days and nobody has texted me or called. Should I try to run into the girl who asked for my number and ask whats up? I've never seen them before what would make them want my snap chat or number?