Hello All, For the past few weeks I been feeling faint more so while sitting. Having shortness of breath at night when i go to sleep. Getting Fluttering, bubbling in the legs as if blood was trying to get through. This all started a few days after i stopped smoking after 10yrs and its been 3 weeks now and is the same. The feeling is annoying. I have Blood work coming up and a physical but wanted to know if anyone knew what these symptoms describe.