I'm having this pain when pressing into my belly button; the pain hasn't travelled anywhere else in my abdomen. is it appendicitis?

Needs an exam: Can be a few things. Can also be an umblical hernia. I'd suggest seeing a doctor for this. If it gets worse, see a doctor as soon as possible, even if it means going to the emergency room.

Uncertain: Depends on how long the pain has been there. Most likely diagnosis would be a small hernia, but it could be the beginning if appendicitis, and disease that usually progresses over 24-48 hours. See your doctor to find out more.