Hello,I'm a 36 yr old female accustomed to bouts of gas, bloating and consipation. But since January, I've been suffering episodic bouts of upper abdominal pain and cramping w/nausea and or diarrhea. The pain just behind the lower notch of my ribcage. It feels like the rhythmic cramping you get with a stomach virus. I get this every month approx a wk after my period. (Although this last bout was just before it.) I had an ultrasound and the Dr. diagnosed me with IBS. Isn't IBS a large intestine (bowel) problem? What do you think?Thanks,Lisa