im having ongoing burning sort of acidic feeling pain but its NOT acid reflux at all, it feels its in my lung its making me cough?? its my left lung ,, this started a month ago, there was two days that i felt like this, then it went away.. and now I've been feeling it again this time its making me cough this is the third day. i describe my pain as an uncomfortable burning feeling in my lung (i quit smoking in 2010) it feels like a cracked or chapped split lip in BUT in my lung.