I have been experiencing breathing problems. I can't really take a deep breath w/out it hurting. I especially got some type of pain in the back of my left lung. When i exhale i feel like i'm gonna pass out at times. It was subtle at first but now these 'episodes' are more frequent & severity is escalating. Sometimes my lungs feel like they are burning & they ache too. Coupled w/ heart pains now too. Heart pains are different day to day. Sometimes crushing pain, sometimes a poking pain, sometimes a burning/searing sensation around my heart. My heart feels like it might skip also. I have aches here as well. My primary care physician says it's anxiety but I've passed out several times doing recreational drugs that i never passed out to before so i know something is going on. I stopped doing them but i fear any minute now that i will pass out jus' from air. Someone please steer me in the right direction or shed some light.