short chest pains what could it be

[Thai]

just recently like a week or two i noticed i get short chest pains on my left side in between like my breast bone and my left boob.... it lasts for two to five seconds and if i apply pressure and breath it will go away im not sure what it is and havent told my parents yet ... dont want to bother them just yet ... any ideas what it could be or what could be causing it .... btw im 19 i dont smoke, i dont want this to be biased or anything but i do have asthma....i know that could have something to do with it but other opinions would be helpful

thanks