Hi, I am 33+, smoker for 15+ years, for the past 1+ month I am experiencing the following symptoms quite often- sweating in palms and feet,feeling a bit dizzy, feeling of fainting , urge to urinate , irregular bowel movements, fatigue, back pain , neck pain etc., After a great effort I had quit smoking for a month and then started again 3 months ago. Can you please tell me as to what causes these symptoms ?