Hello, I Had Strep Throat Last Friday And Got Omnicef.

Hello, I had strep throat last Friday and got Omnicef. Since then I have had horrible since pressure for about 4 days, I took Sudafed geq. I got a little better and now I just have ear pressure and slight nasal pressure. I also have horrible horrible mucus in the back of my thoat that feels like its stuck. It feels like I have a mouth full of snot. I have been coughing a lot lately to the point of gagging and throwing up globs of mucus. I have trouble breathing in fully and some coughing fits makes it hard to breathe. I am still on Omnicef and I have a Ventolin but not doing much. I just dont know if I sould go to a urgent care again. Thank you so much.