I was just diagnosed with IBS (FINALLY!) this week after a few particularly nasty rounds of nausea/vomiting along with the usual IBS symptoms. I'm trying out find out if the terrible nausea/vomiting (which lasts for 12-48 hours) is part of my IBS or if there is also something else going on. It always coincides with an IBS flare-up.History:I've had IBS symptoms all my life, beginning with being a colicky baby for the first 18 months of my life. Every few years or so I'd have flare-ups intermittently over the course of several months. I recall feeling nauseated then too, along with the cramping, bloating, etc., but not quite to the extent that I've been nauseated this time around. Of course my IBS flares when I am preg. Lately I've been able to tell the exact day when my cycle is going to start by when the IBS pain (and nausea?) kicks in. Usually I'm extremely constipated and during my recent flares have had watery diarrhea. From what I've described it does sound like the nausea/vomiting is part of the IBS, but there are 2 reasons why I'm not really sure it is. First, I've had the horrible pain, cramps, bloating, etc. without the n/v before. Second, for the last several months I've been feeling nauseated after meals (esp. if it was fatty or high in protein and I ate more than about 5 mouthfuls) and have not had the pain associated with IBS.I can handle the IBS pain OK (I've gotten used to being in pain a lot); it's the nausea/vomiting that is really nasty! Any insights on what might be behind it? If it is the IBS, what can I do to get rid of it? I've got to get this figured out soon b/c I'm well on my way to becoming a living skeleton!