My entire life I've always had digestive problems. When I was younger I always experienced explosive diarrhea after drinking milk--however, my blood test results indicated that I wasn't lactose intolerant. In addition, throughout my teen years I would only experience a bowl movement once a week. Along with this came feelings of bloatation, flatulence, abdominal pain ("stabbing" pains), lack of energy, etc.
I'm now in my mid-twenties and although the symptoms haven't changed, I can at least get out 2-3 bowl movements a week. It wasn't until recent that I learned my extended family also suffers from GI issues (i.e., Ulcerative colitis, uncle hospitalized for GI issues, cousin with GI issues, and a sister that is gluten intolerant).
Right now I'm trying to eat a low-gluten diet (similar to my sister) and increase hydration along with daily activity then see if that helps.