<human>: Give me the gist of the text in a nutshell

Greetings, mighty fine people of reddit!

I'm having quite a serious problem and I'm not sure what to do. Yesterday I felt quite vicious pain in my very right abdominal area, on my flank to be precise. It was stingy/crampy and constant. I didn't know how it started though, but it wasn't an instant rush of pain. I took some painkillers and woke up today, still with pain, but a lot more minor. I washed the dishes, shopped for groceries and got into tickle-wars with friends and that was all bearable, with some discomfort here and there. I ate pretty normally (read: a lot) both days too and pass gas a lot (both front and back ...), so I assumed it was some kind of problem related to that. Talked to a friend and he thinks it might be appendicitis. I'm really scared now and not sure what to do. It's about 1:30am as I'm writing this, so just going to a doctor isn't an option. I don't just want to call the ambulance either, because it would wake up and scare my sister and her friend who's sleeping over. The pain is pretty managable right now, but that might be due to the sitting position. When I walk it gets more uncomfortable, but still managable. When I press my side, it hurts. I feel kinda bloaty all around, so that kinda makes me hope it's just gassiness after all ... but I can't be sure and that really bothers me. No fever either.
<bot>: I might have appendicitis, but I can't be sure and I don't want to scare my sister to death by calling the emergency service (my mother recently died after being rushed to the hospital by the emergency service)