Flu/cold season

My daughters started school 3 weeks ago. My middle little girl came home with a cough and sore throat. All weekend with a cough but no fever. My oldest came home yesterday with a cough and sore throat and fever. Now I have a sore throat and feel a little hot. I’m breastfeeding baby and just got my period so my supply dipped 😩😭😭 now I’m stressing that I’m not making enough and scared baby will get sick. I feel horrible also what can I take since I’m breastfeeding? What medications are safe?