Digestive problems? Gallbladder? IBS? Pancreas?

Hello,

I am a 19 (20 in June) year old female. Early last week after I began eating dinner (I had only had a few bites) I experienced a dull, annoying pain on my left side directly under my rib cage. Within minutes it had spread throughout my entire front side and then the pain wrapped around my back. The pain lasted for several hours even after laying down so I did not finish my dinner. The next evening while I was eating dinner the same thing occurred, though the pain was worse because we were out for dinner so I was unable to lay down. During the day when I have snacks I experience the same pain, although it stays focused on my left side under my rib cage. This morning I woke up with a dull pulsing pain on my right side under my rib cage. During all of this I have had continuous diarrhea that began a little over a week ago, although it is on and off depending on the day. I have not changed my diet recently and my menstrual cycle has been on time. I do not take any medication regularly and I have not been sick since last year (2011). Has anyone else experienced similar things that have (or have not) been diagnosed with something? I am currently in Michigan at my father's house and I live in Indiana. I will be driving home Monday morning and plan to call my doctor when his office is open on Monday morning. I am unable to go to the doctor until then.

Thank you for reading this!