What Causes Upper Left Abdominal Pain, Diarrhea And Nausea?

I have been having upper abdominal pains for a few months and the last month however it has gotten worse. The pain is mainly in the upper left side but I have burning all in the top abdomen. I ve also had diarrhea for the last four days, today is the first day that it has been somewhat formed. However my stool has been a yellow color. After eating I normally feel nauseous, but at the same time I feel that way when waking up, I have also been having stomach cramps mainly in the upper stomach and just feeling bloated and full all the time, my stomach has also been making noises like as if I was hungry. I seen a G.I. doctor two weeks ago and he has me scheduled for a upper G.I. the first week of March, I m not sure if I should wait till then or go ahead and go to the ER to see if they can treat me for whatever is going on.