I have a really bad pain by my belly button and it really hurts when I try to go to the toilet, but nothing comes out. How can I get rid of the pain?

Belly pain. Undiagnosed abdominal pain requires that you see your doctor to determine what your problem is. E.G. You could be having appendicitis or pelvic infection or other problem. If you do not have a doctor , go to a walk in clinic.