Can Nyquil And Mucinex DM Be Taken Together For Cold, Cough And Sore Throat?

I have had an awful head cold for 7 days now and have been coughing constantly so throat is raw. Been taking dayquil and nyquill and robitussin DM. Can I take nyquil and mucinex DM together and what about dayquil and mucinex DM together? My doc said he doesn't want to give me antibiotics. My husband and daughter have the sane thing and they gave had it about a week more than me. We are all miserable and tired.