Two months of nasal congestion is something that should definitely be looked into. The most common cause of nasal congestion is the common cold caused by a viral infection. It would be quite unusual for this to last for an entire two months. The time period for your symptoms makes allergies a much more likely possibility. Allergic rhinitis (the medical term for a stuffed up nose), can have several causes. First, if you have recently acquired a new pet
such as a cat, then this could very well be the culprit. If you have recently introduced a new plant into the house of if you live in a climate where it is warmer, then simple pollen or other plant substance could be responsible. Finally, if your house is particularly dusty, then dust mites may be the problem. Either way, I think you should be seen by a doctor
Your first step should be to schedule an appointment with your primary care physician
. He or she can take a more detailed history of your symptoms and perform a thorough head, neck and lung exam. This should be able to rule out viral illness as a possible cause of you symptoms. From there, your doctor can pry further into your recent history to determine what could be causing these symptoms, and finally recommend treatment.