Wow, I also quit smoking 6 months ago after having a panic attack from no where, there is nothing in this world I have not been through as withdrawal symptoms. Head pressure, breathing problems, muscle soreness, anxiety and negative thoughts, everything. I am happy the intensity has reduced. I have gone to the hospital more than 15 times in this past 6 months and did ECG, chest x- ray and all is fine. I just pray that all this pass so that I can live my life. Who would have known that cigarette was out to kill us.