H.W.
Go to the doctor if you haven't already. My bad pain resulted in appendicitis and I had to have surgery that day. Here's the thing about appendicitis (if you haven't already gone to the doctor).... if you get it before the appendix ruptures, it's a laproscopic surgery , which was a pain to recover from, but so much better than the appendix rupturing, going septic, and having a more invasive surgery and possibly sepsis, which is deadly. Those are the people who end up being in the hospital for a week or more. Mine was an overnight surgery and I went home the next day.
You ask about labor and delivery. Yes, if you are pregnant, don't wait to get this checked out!