Could ibs be the cause of diarrhea that occurs daily? or is it more likely to be something else?

IBS: IBS certainly can be a cause of chronic diarrhea, although there are many other possibilities also. A good initial approach would be to increase the amount of fiber in your diet and take a fiber supplement such as Metamucil daily for several weeks, to see if it helps, before embarking on a work up. Be sure to increase your fluid intake also. If this doesn't help, see your doctor. Good luck.