Other things can cause tummy pain.
I was nearly carted to surgery to have mine removed once before they realised it wasn't my appendix after all.
I had another time when I was worried it was my appendix and it turned out to be a tummy ulcer and the pain with that was horrendous.
A friend of mine was in and out with tummy pain for a week or so until they finally had her in and took her appendix out.
Just keep an eye on it and hopefully it'll clear up on it's own and you'll feel better soon.
Just be very careful with hygiene if it's a bug and if possible let things get out of your system rather than trying to stop the runs if you can and try and keep away from sweet stuff.