I'm 26 year old male .A picture of health until 9 months ago,when I had a bad cause of diarreah for 2 weeks. Every since I've had indigestion,nausea,gas,burning and churning of my stomach,bad taste in my mouth. I have no energy and feel weak. Sometimes I get lightheaded.But the funny thing is maybe 1 day out of the week I feel fine.PLEASE SOME ANSWERS