Only full time management get paid sick days. Associates can take non-paid sick days, and longer with a doctors note. If serious enough, they might be able to apply for sick leave, but I'm not sure if there would be pay. Management usually get about 40-50 hours I think of sick pay per fiscal year I believe.
As long as it's 2 hours before your shift or more you're okay. I don't know how many sick days you get