I would have your water tested. It could be contaminated. Do you have a reverse osmosis filter on your supply line? 

You could have easily picked up an infectious gastroenteritis bug from the water.

Jan

I agree - I also had trouble with well water when we lived on a ranch years ago - I had to stick to bottled during those years.  My GI is very sensitive to water - and even city water....has been for years. Who knows why?  Don't remember any of this pre pouch.

I have been drinking well water with a rather high mineral content for almost 6 years and have had no problems.  I suggest that you avoid drinking your well water (and using it for coffee, cooking, etc.) for several weeks and use bottled water instead.  If your severe cramps and diarrhea go away, then your water is likely to be the cause.  If you have not otherwise done so, have your well water tested for bacteria and other contaminants.

Bill - great suggestion - excellent.  I know there is great well water out there - we couldn't change ours and it was west texas well water (bad water out there) - hated living there.  I think you live in Indiana? Illinois?  I was born up there and would love to get back that way - the water would be (in my view) much cleaner and better there.  Great advice about how to check - excellent!

I live in the northwoods of Wisconsin and our well is 825 feet deep, almost all in granite bedrock (long story!).  Although the water has a high mineral content, we have gotten used to it.  Most wells in our area are much shallower and have better tasting water.

We have only well water at my friend's cottage up North in Ontario in the Highlands. I never had a problem...But they have it tested regularly. 

At other cottages that I have been to they boil all of their water before using it. I believe that it is about 5-12 mins.

They keep it in jugs in the fridge afterwards.

Sharon