sharp upper right abdominal pain, IBS or something else?

Did they do a hida scan on you? Ultrasounds will ONLY show gall stones, but you can have gall bladder problems and not have stones. The hida scan tests for gall bladder function. And even then they can turn up false negatives; I had three before they finally found my gall bladder wasn't working properly.

Reddish and blackish poops are not a symptom of either IBS or bad gall bladders. Bad gall bladders tend to give you yellow poop. IBSers have either brown or yellowish poop, although people with diarrhea can have other colors, like green, based on what they eat. I would be concerned with reddish and blackish poops if you can't blame them on something you ate. Anything with a lot of red food coloring--like Kool-Aid--can color your poops red. Also Pepto Bismol can turn your poops black. But if you aren't eating/drinking anything like that and are still getting poops that color, then you need to see a doctor and get tested for blood in your stools. If you haven't had a colonocopy yet, you should get one of those too.

Have you asked to see if there is a prescription gas reliever or if you can take more than the recommended dosage of Gas-X? Some people just have extra strength gas. Make sure you use a hot water bottle or heating pad frequently too since I think we've all found a little relief from the cramping with those.