Pain at the top of my sternum and chest. went to the er got ekg blood tests everything came back fine. torn muscle maybe?

Could be...: Did you do an activity that where you could have done this. If this was from some activity, you should be able to recall what you did in the last 48-72 hours and that likely was the cause, if this is a pulled muscle. Did they also check your lungs, is the pain still there or now gone? Sounds like the er said it was not your heart but didn't give you a likely diagnosis. Look into tietze's.