Hello Doc , I Want Ur Advice ,( Age 21year

Hello doc , I want ur advice ,( age 21year , height 5.5 feet , weight 54 kg ,) my problem is as follows: stomach burns after eating , physical state of stool always fluid / semisolid , after eating feel to go for discarding waste , loosing weight , feel weakness . In 2016 starting I got stool test and cultural test and consulted with a doc of my locality , the doc told that pus cells is in ur stool . I eat timely and sufficient but no growth . What is ur advice and medicine which should I take .