I'm pretty sure that the only thing on your left side is the colon, large intestine. Could be you're about to pass some more wormies?? I've heard many people say they get bad bad cramps and pain...then within a few hours pass the ugly critters!
How long has your left side hurt for?
I guess at some point you will probably do a Bowel Cleanse too eh? You gotta clear out those critters livingrooms!! yup.