If you are having appendicitis symptoms, don't try to tough them out. You should go to the doctor immediately. Even if it seems like chronic appendicitis, which isn't as dangerous (but can still be deadly) you should go, because the same symptoms can account for several different diseases.
The appendix can become cancerous like any other organ and people might also mistake some other kind of pain for appendix pain. It's better to just go to the doctor and make sure you are OK.