What could be causing my weight loss and abdominal cramping?

[Rosie3625]

I am a 39 year old female. My gallbladder was removed 10 years ago. I have Type 2 diabetes, high blood pressure and high cholesterol.  For the last three weeks, I have had abdominal cramping which has stayed constant and have occasional shooting pains, primarily in the left side.  My PCP ordered blood work, which all came back within normal ranges, as well as a CT scan with IV contrast (which also came back normal).  I'm exhausted all the time, go back and forth between diarrhea and constipation, have nausea, anxiety and confusion.  I'm much weaker and some nights the pain in my abdomen wakes me up, making me rush to the bathroom. I've lost 18 pounds in 3 weeks.  Help!

[Red_Star]

Excerpt from Diabetes Daily -
What’s Bugging Your Gut? Diabetes, IBS or Both?...

"If you have “gut issues” – meaning diarrhea, constipation, cramping, abdominal pain or nausea – and you have diabetes, you are not alone. In fact, this relationship is more common than you – or your doctor –  may realize.

Up to 75% of people with diabetes have at least one gastrointestinal symptom. These GI problems can include diarrhea, constipation, abdominal pain, and vomiting. The most common GI problem that results in diarrhea is Irritable Bowel Syndrome (IBS) and the links between gut problems, namely IBS and blood sugars are tightly woven and interconnected.

Even the severity of symptoms is closely linked to the glycemic control of the individual. Meaning the worse the glycemic control, the worse the GI symptoms.

High blood sugars make it hard for the stomach and small intestine to work normally. At the same time, IBS itself can make it harder for your body to control post-prandial (or “after meal”)"