OUCH !!!

It's been a week liao.. experiencing pains in the middle of my rib cage... You know there is like this bone in the centre of your chest. Yeap its been giving me alot of pain !! Sometimes i cant breathe properly cos it sorta prevents the expansion of my lungs when i breathe in. It is getting kinda uncomfortable sia... dunno if i should see a doc.. cos i am actually fine till i stretch..