been having discomfort in left chest for about three weeks. went to doctor a few days ago and he did a EKG which returned normal results. he told me i have inflammation in my lungs and gave me ibuprofen. while on it i feel less discomfort. i didn t think about this when i was at the doctors office but if this was the case wouldn t i have trouble breathing? because i can breath just fine. also when im laying down i can sometimes feel my heard racing for a few seconds.