I went to the local urgent care and they did an xray of my lungs. They were clear. I don't wheeze when I breathe or anything, so they don't think it's asthma. Thy think I pulled a muscle in my chest and it's affecting my breathing, and prescribed a muscle relaxer.

The thing is, this has been going on for weeks, and I don't remember doing anything that would have hurt me like that.

Now that the lungs are ruled out, I'm scared they got it wrong and it's something to do with my heart. My mother had a heart attack in her fifties.I'm taking the muscle relaxer and hoping I'm just being paranoid.