Take a chill pill, momma. Stress can affect pregnant women in several ways, from high blood pressure to heart disease and even premature birth before 37 weeks, a leading cause of newborn death and disability. And new research indicates that stressed-out soon-to-be moms may be aging their babies faster in one unexpected way. Experts from the University of Rochester suggest that teething starts sooner for babies of frazzled moms. “We show that a mother’s higher levels of stress-related hormones,