I'm 5 months pregnant & have pink eye. Dr prescribed erythromycin ointment. She says it's safe for pregnancy. Is it the safest?

Yes. Erythromycin is safe to use to infant and pregnant woman. If you have pink eye its viral conjunctivitis, you may not need the antibiotic for it. Time will take care of it. Just wash your eye with cold water or put cold compressors.