i started laughing and under my ribs began to hurt?

[Livingdead1]

okay so a while ago in gym class we were playing soccer. i was having fun running around and everything and laughing. all of sudden ribs on the left side began to hurt so i had to sit out for a while. it happened again a couple weeks ago. but this time i really wanted to play so i sat down for a minute and started playing but my ribs were hurting really bad. after a while it went away though. so this has happened only twice. but im wondering if there's something wrong and if i should have my mom take me to the doctors. i really dont think i should until it gets really serious but it might be because of laughing to hard or something.