I sometimes get internal vibrational type tremors in my abdomen before my intestines start acting up into cramping or diarrhea.

This was very severe when I had my drug reaction which caused angioedema + a lupus reaction. The angioedema causes the internal organs to swell, and this I guess causes compression of various nerves. It didn't happen all the time, just when I was going to get an "attack" of pain and diarrhea.

I think I mentioned angioedema to you before? This can be inherited or acquired (from ACE inhibitor drugs), or both, which my doctor now thinks I have. I have not had internal symptoms of vibration since I stopped that evil drug.

I am not surprised that doctors gave you a hard time...I think most of the time they have no clue about suffering at all!