Aciphex and diarrhea

I had been on Aciphex for about 4 years because Nexium, Prilosec, and all the other meds did not help my heartburn. I started having problems wtth my bowels, I thought I had IBS but with the diarrhea effects. It was so bad some days that I could not drive to work. I would have strong urges to go to the bathroom which literally gave me less than a minute to find a toilet. I never thought it would be the Aciphex. I recently switched to Zegerid and have not experienced quite the problems I had in the past. Last night I took my 1 remaining Aciphex and this morning the problems returned. I am sure now that the Aciphex has something to do with it. I am wondering if there is any long term damage/effects from it.

I have been taking Aciphex for about a month when suddenly I started have terrible stomach pains, severe diarrhea, and extreme exhaustion. The exhaustion was so extreme I was sleeping for 2-3 hours a day, not even planning a nap, just crashing on a couch.
I feel bloated and my mouth is dry and feels metallic..in short I felt plain awful!
I thought I was fighting off a stomach flu, but it did not feel "fluish"..I then had one of those light bulb moments..this was the only new medicine I have added to my regular regime.
I am stopping this drug immediately..will let you know if my instinct is on target.

Dark, tarry frequent stools which is of great concern. I will contact my doctor immediately about this. Only been taking it for 2 days! Started with prevacid for 2 months which caused diarrhea. acifex was offered to me as a substitute that has "fewer side effects".