Hi thanks for writing to Practo. Pls keep baby away from you. Also let baby be taken to pediatrician for further advice on medication if required. You remain infective 2-3 days before rash appeared and for 5-6 days after rash appears. And baby can get it if you breast feed, as virus is found in breast milk too.
Next Steps
meanwhile you may express your milk and dispose it else you will get engorged.