I am having indigestion issue from last 3 months which is causing me frequent Diarrhea and making me lose weight i have lost over 5 kg of weight in a period of time . having nausea and weekness all the time . sometimes postural tachycardia while standing pulse goes to 160 got ecg echo and tmt done which all came out normal. Took Rifagut and pre and probiotics but no effect still the condition is same . Got celiac disease test done which came out negative is there anything i can do for this also this problem is making me very very stressfull and anxious . whenever i eat something there is some king of nervousness and anxiety comes with that also there are stomach cramps and fluttering in stomach