Thanks for your question and I recommend that you discuss it with your doctor
. A cough in an otherwise well person can be frustrating for both the patient and the doctor. You are correct in questioning whether or not the original insult (the dust from your furniture, perhaps) had anything to do with this, but it is also relevant to realize that you have now moved to a new location and there may be some new allergies that you are experiencing in your new location. For example, if you now have a cat, live in a more rural location, have a new room mate, etc, you could be reacting to these changes. Chest pain itself can be a very concerning symptom, and so you will need to speak with your doctor to make sure that there is nothing more serious than just the cough that you are describing. While heart attacks are uncommon in young people who are otherwise well, it is important to consider all of the possibilities if you are not getting well quickly. Other things could include infections, either deep seated or simple things, and also many other options. Please speak with your doctor about this question, and undergo the additional testing that he or she may feel is necessary.