Gray tabby cat with blue collar

I lost my gray tabby cat yesterday around 3pm near the library on Hardy Street by the USM campus. She's medium-sized, fluffy, and wears a bright blue collar with a tiny silver bell that jingles as she moves. She also has a distinct white heart-shaped patch on her chest and a small scar on her right hind leg from a tumble last month. I'm really worried -- she has been my apartment buddy for years and this cat means the world to me; if anyone found her, I would be forever grateful to have her back.