I've been experiencing moderate to severe chest pain on the right side for at least 3 months. In the past 2 months, I have also been struggling with severe fatigue and almost constant joint and muscle pain. I also have a pretty nasty hacking cough, and difficulty breathing. I've always had occasional aches because of dance, but its all the time now and getting worse. I can finally see a doctor now but should I? They've done x-rays at the er and couldn't figure out what was causing it. I lived with a 2 pack a day smoker for 18 years in a small house.. not really sure if that has anything to do with it