I smoked for 3 months, and stopped because I suddenly couldnt breath deep anymoreI stopped smoking 2 weeks after that happened. 3 months later, I still can not breath deep satisfying breaths and I fear I have damadged something, I had a chest xray, and that came back clear. My other sypmtons is that I keep getting sick, I also had a blood test, and that showed that I am low in white cells, and that I was Iron defitient. What other tests can I take to find out why I am constantly out of breath?