Mucus and congestion relief?

Iy

My throat clogs up with mucus so much and I don't know what to take to get relief. Hot teas work sometimes but not all the time. Much OB said I could take Sudafed, Cleratin, Robitussin, and Benadryl. I tried Robitussin but it makes me sick and throw up the whole day when i take it and it's liquid. Have any of you ladies found luck with these other products?