Been taking approved OTC medicines with no improvement!

I am 15 weeks and 1 day prego and I started getting sick on Monday. By Tuesday I felt horrible with stopped up ears and nose. Wednesday was not any better so I started taking Sudafed and Robitussin for the cough. Now it's Friday and I'm no better.  I still have stopped up ears, runny nose now and congestion in my chest. If I go to the Dr, will they prescribe something or do I have to wait out this miserable cold?