Martina Sanchez, 48, a home care worker who works for an elderly client in Morton Grove, said she was told not to come to work if she is sick. But she doesn’t have paid sick days — Morton Grove was among dozens of suburbs that opted out of a Cook County ordinance to allow workers to earn sick time. She can’t afford not to work when there are bills to pay, she said. Sanchez, the main breadwinner for her family of five, earns $80 a day and works up to three days a week.