Ribs keep getting locking sensation?

I fell asleep in my clothes accidently and i woke up in pain from my ribs becase id fell asleep on a huge metal stud that you fasten the jacket with, it was so painful but i guess it cant of gotten lodged in? Anyways a month later every now and again my ribs have a locking sensation if i bend to the side and feel the exact same pain i felt after i woke up, any ideas what i could of done, could i have chipped a bone??xxx