How will I know when my grumbling appendix is serious enough to go back to the hospital?

I spent the day in the docs and hospital having tests and they confirmed I have a grumbling appendix, which has been effecting me for a week now - sometimes with harsher pain than others. It wasn't feeling painful when I was at the hospital earlier so they said there was nothing they could do about it until it gets worse and that sometimes it can feel worse than others but until it's practically agony, they can't remove it. I don't want a huge scar and it does hurt now - surely the safest thing would be to get it removed by keyhole surgery now before it erupts or anything? How will I know how serious it needs to get before I can get it removed with keyhole surgery?