If your really sick. You need to go to the doctor. There is medicine they can give you while pregnant that will get you feeling much better. I had the same thing last week and the doc gave me z-pak tabs for cough and Sudafed for sinuses. You can take mucinex that really works if you don't wanna go to Dr.
I also heard you can take Robitussin for your symptom. But i am a natural remedy chick. I just took vitamin c pills 4 a day to build immunity. It took about a week and a half to overcome it. I did use halls and tylenol for the headache tho i had when i got sick.
Im not sure what you can take for a cough maybe try warm decaf tea with honey and lemon just to sooth. For stuffy nose and congestion my Dr said I can take sudafed but not the stuff on the shelf you have to get it from the pharmacy. I didn't have to have a prescription but the safe for pregnancy sudafed is stored behind the counter.