Intestinal Pain and Diarrhea

Every 4 or 5 days I get a burning sensation in my intestine, followed by pain and diarrhea. I did not have this problem before, but did have it a couple times before I had my gallbladder removed in 1999. I need some ideas of herbs to try. I am currently taking milk thistle, and Lopermide and Loratab for pain. Help please.
I have been to number of doctors. They say Irritable Bowel Syndrome, but my diet does not change anything.

Irritable Bowel Syndrome can be caused by stress, anxiety, food allergies (especially dairy products) or parasites. Diarrhea, alternating with constipation, bowel spasms and flatulence are the usual symptoms. It would be most effective for you to work with a qualified herbalist who can assess all of your symptoms and look for underlying causes. The underlying cause must be removed in order to realize an improvement in health. If stress and anxiety are factors, then you may need help to find herbs and lifestyle changes to improve the health of your nervous system. If parasites are involved, you will need to eliminate them. Digestion is more difficult without a gall bladder, and this may be contributing to your problem. Please see our web site, as listed below, for the item "Help for Digestion after Gall Bladder Removal".
The common herbs used in irritable bowel are of the following types: astringents to contract the mucous membranes of the bowel to reduce excretions; demulcents to soothe the intestines, antispasmodics to relieve intestinal cramping and anti-inflammatory herbs. Some of the best choices are: agrimony (Agrimonia eupatoria) – astringent; meadowsweet (Filipendula ulmaria) ?- astringent, anti-inflammatory and antacid; German chamomile (Matricaria recutita) ?- calming, antispasmodic and anti-inflammatory; and slippery elm bark powder as a demulcent.
For more information on irritable bowel syndrome please see our web site at . Choose Q&A from the main menu, then enter "irritable" for the search. Enter "gall bladder" for the search to see the item " Help for Digestion after Gall Bladder Removal".