What cold cough and fever medicine should I take at work?

Probably stay home. You are likely to be infecting your coworkers. If you have to work and want to minimize symptoms, there are many otc products. For cough, choose one which contains dextromethorphan (usually designated by dm on the bottle. Aspirin or Acetaminophen will help your fever and achiness, and you may also benefit from a decongestant. Look at the bottles or ask pharmacist.