OOOOOOOOWWWWW really in pain HELP?!?

about 5 days ago i was in vacation in mexico. On the very last day i started to get diaria (i don't know how to spell it sorry!) any way yesterday the diaria stopped and was replaced with REALLY BAD pains all around my belly bButton(note that the pain wa saboutthree inches radius if my belly bButtonwas the very center. The pain feels like something is squeezing my stumack(again ssorryfor the very bad spelling) Lately the pain never went away, but sometimes the grip of "squeeze" loosens. To sum it up it really HURTS Any ideas on why im having pain? Yes i am going to the doctor. Also i really dont feel like oppening up spell check because my tummy is hurting really bad currently