my son has been trouble breathing for past months, its not all the time . he looks like he is gasping for air , like he can't catch a full breath . he is 10 years old, has done sports since he was 4 , past few months he runs out of breath during running alot quicker , has to take more breaks . I have taken him to the doctor and the all childrens hospital and they say his oxygen levels are good , they took x-ray of his chest and they saw no issues , but he wasn't gasping for air during the times they saw him , they took blood sample aswell , and they said everything looked ok. not sure whatg else to do, but i know there is something wrong , his breathing is not right , he struggles to get a full breath at times when he is just sitting on the couch . I would appreciate any suggestions or any advice on this matter , thank you for ur time , YYYY@YYYY or 941-539-6868