14 y/o sharp chest pains

I have a son who is 14 years old, who has been experiencing chest pains for about 2 weeks.  It seems to hurt more when he first wakes up.  We have been to see the physician 2X, first thought to be acid reflux, rec'd meds (meds did not work).  A G.I., and blood work done, all normal. Doc said that this could possibly be growing pains.  I also noticed that this also has been more frequent since taking motrin and iboproben (for headaches), could these meds be causing this.  I read in the PDR that tighting of the chest, was a rare but a side effect of iboproben.  I have today taken his off this to see if the pain does subsides. He does participate in sports also.  Please help.

[CCF CARDIO MD - DLB]

Motrin and ibuprofen can irritate the stomach. Perhaps this is the problem. I do not believe they really cause chest tightening, though they can rarely worsen certain types of asthma. Stopping the medicines may help.