Is evamist safe for women who are pregnant or breastfeeding?

No estrogen. Evamist is a estrogen supplement approved for relief of menopausal symptoms, like hot flashes. Unsure why a woman in reproductive years would be using it? Nevertheless should not take it unless advised to for off label use by your doctor.
NOT SAFE. It use in pregnancy is contraindicated according to the prescribing information included with the medication by the manufacturer.