Unknown Diagnosis

Hello just thought I would try to post a question to see if anyone else has had my symptoms.  I am 27 years old and when I was in college (about 20 yrs. of age) I was diagnosed with IBS and a spastic colon with no colonoscopy or upper endoscopy procedures.

About 7 months ago I started getting chronic diarrhea and horrible cramps.  I wrote it off as IBS and did not go to the doctor until about a month passed and I started getting a fever.  They took a stool sample, a urine sample, and a blood sample.  They found a raised amount of WBC in the blood, found out I had a UTI, and saw a lot of Staph bacteria in the stool. No anemia or iron loss. They gave me amoxicillin and sent me on my way.  It did clear up for a little while, until I started getting chronic diarrhea again... this time without pain or fever.  Around Christmas time I started getting an extremely sharp, radiating pain right under my ribcage and radiating to the back. The pain would come in "waves" and was worse at bedtime. In the morning it wouldn't be so bad.  This happened for a week and then "poof" it went away.  I thought it might have been a kidney stone from dehydration or gallstones.  

I decided to go to a gastroenterologist.  He thought it was a bacteria that was the cause and immediately put me on Flagyl.  He did an upper endoscopy and a colonoscopy. The upper showed that I had a mild case of gastritis and a small hernia in my stomach.  The colonoscopy showed a couple small ulcers and internal hemorrhoids.  The biopsy for the stomach came back normal and one biopsy from the colon came back showing inflammation.  I am currently on omeprazole (Previcid?) and metronidazole (Flagyl?) I have an appointment in two weeks to see what the results mean, but if anyone has any ideas or questions I should ask him it would be greatly appreciated.  Also, are there any tests I should undergo if he doesn't suggest anything?  Does this sound like anything?