Talk to Gastroenterologist on Bloating, Chest Pain, Facial Changes After Eating

Whenever I eat even a small portion of a meal, I get severe bloating especially in my upper belly. Below too but the upper gets more bloated or swollen and tightened. Also, I get chest pain out of randomly, not after eating a meal or skipping, I just randomly get it and it randomly disappears too. Moreover, whenever I eat anything, people tell me I was looking okay before but after the meal my face gets sunk, and appears more dull and weak after eating. Please tell me which doctor I should go for a checkup. Because I have visited many doctors my whole life ( I have had these problems since childhood except the chest pain I got this year ) the medicines aren't working for me rather the meds have made me more weak. My legs now tremble and I speak stuttering too out of weakness. Please anyone guide me.