Hi, I Have Had Cold Symptoms For A Few Weeks.

Hi, I have had cold symptoms for a few weeks. Coughing throughout the day early on and congestion at night. Chest felt a little congested but is better now. Actually x-rayed for pnemonia (sp?) and was clear. My question is my cough (although quite mild now and mostly evenings) is persisting. I am able to work (office job) without limitation, but would like to start exercising (bicycling again). Should I wait until the cough is completely gone?