Sternum recession

[Happylittlebee89]

Hello

Wondering if anyone can offer any advice I took my baby to my local surestart centre to get weighed and whilst there they said he had recessional breathing I took him to see a doctor who send me to the hospital after checking him over they said he had sternum recession and hysterical and erratic hearttate but sent me home this was a month ago I have since been back to my gp twice as he has done it a few more times and today again at surestart they picked up on it again ive made an appointment with a gp but Im concerned as to what can be causing this any ideas or suggestions welcome thank you