Sir ,i am a 21 year old male , 183 cm tall and weigh 54 kg.Two years ago , I had a blunt traumatic injury in upper abdomen.I had pain in abdomen and cramping for around 3-4 months and then it gradually subsided.But I developed copious release of gas and diarrhoea ,and i had to rush to restroom 3-4 times per day.I consulted a gastroenterologist and performed adbominal ultrasound and complete blood count.Both were negative and no free fluid was in abdomen.The doc told it was IBS and gave medications.Though the diarrhoea reduced , the gas still persists.I feel tenderness in the area of trauma.Once , I deliberately exercised pressure over the area and felt mild pain.After an hour or so I had an urge to go to the restroom where i had severe diarrhoea with blood in stools.The next day I excreted white mucous.But after that ,I was normal.What should i do?