Help! I can't stop this cough and runny nose.?

I have had this "cold" for 2 - 3 weeks now. My head gets so congested I get headaches, my throat kills, my nose is a faucet and I cough so much I literally choke most of the day. I'm getting no sleep cause of the coughing. Do I go to the Dr for what could be just a cold? Is there anything going around I should know about?