i have a sharp pain in my abdomen, what do i have?!?

[K8lyn]

yesterday i woke up for class and my right side underneath my ribs and a little lower were killing me. i felt sick and tired all day and had a head ache and chills. i thought i was just dehydrated but i wasnt. i came home and slept for 9 hours, but waking up inbetween sweating and sharp pain in the same place. if i breath to hard the pain worsens. im not sure what this is, it sounds like appendicitis to me, but i dont really know.. help please