Hello Doctors, I've been suffering from gas issues from past few months now, last month i was on medication which gave me some relief. I went on vacation few days back and after coming back, I'm feeling blurry vision, lightheadedness and gas issues again. I in general don't feel active anymore, all i want to do is sleep. Sometimes i feel my chest is heavy but there's no cough or shortness of breath. I did ECG last month 2 times and it was normal. What could be the reason of weakness and discomfort? Thanks in advance.