What can I take for a cold?!

Maggie • Age 29. Baby #1 on the way!
I'm so miserable, and I can't get ahold of my OB (for some reason, their phone has a busy signal for HOURS every day). I have a sore throat, cough, runny/stuffy nose, aching sinuses. I've tried benedryl, tea with honey, running a humidifier, lots of water, trying to sleep it off. Any suggestions? Summer colds are the worst. :(