I have had this exact same problem.....
I have been suffering with IBS for a number of years with having abdominal pain in my left side around lower back and left rib cage mainly. I have tried many herbal remedies and been to the doctors so many times I just forget how many it is now! I was loosing hope and thought there was no cure for IBS sufferers. I came across some form of Activated carbon. This carbon is found in underwear! I was so shocked when I saw what they did and how they worked on my local East Midlands news! I thought that is was a big mystery and I was intrigued to find out what they did so I bought some. They really do work! I can't believe how much my life has changed now due to wearing this specific underwear. I can go out without having to worry about my bad flatulence. I hope that all sufferers in my situation are able to come across this amazing invention! I got them off the internet- where I do most of my research for my IBS problem. They are called Shreddies. They truely are the best rememedy I have come across by far!
Gastro DR is sending me for Abdominal/Pelvis CT Scan this Thursday and possible Colonoscomy in three weeks. He does not think it is anything serious. I ate like a pig all weekend and was able to slap on 3 lbs.
This is what I have been feeling lately also.
Okay for some background 2005 was pregnant w/ my son had sever abdominal pains told it was heartburn, after son was born pain was still there so I went to the hospital turns out I needed to have my galbladder taken out and I also pancreatitis. Ever since then I have had severe abdominal pains especially after I eat, nearly every time I eat actually. And the last few days I've been getting this crampy feeling in the lower/left abdomen.