Talk to Gastroenterologist on Stomach Digestion

I have so much gas after eating becomes my right side of abdomen heavy and acid reflux also when I go to bathroom in morning or any other time I have greasy foul smelling stool that floats in toilet every morning I have this my stomach colon feels heavy even after passing stool and have burping and farting , I can't eat fully sometimes Dil hi Nahi krta , then whole night it feels like gas buildup in my belly that's why sometimes I wake up early in morning to go bathroom after emptying my belly I feel okay but I'm not gaining weight also in summers with this probelem I feel so weak I left gym because of this problem please guide me what to do