I have pain in one ear after it cleared during a cold. Should I go see a doctor?

Yes, it would be a good idea to consult a healthcare professional about the pain in your ear, especially since you will be taking a flight in a few days. They may recommend using a product like Sinus Rinse™ to help alleviate the pressure in your ear. It would also be advisable to use a decongestant spray like Otrivin™ or Dristan™ before your flight to help reduce the risk of pain during takeoff. It's important to follow their advice and not develop a dependency on these products.