Non specific ileitis in biopsy. Be.

I am 25 years old. One month ago I noticed blood in stool and one episode of melena . After that I had abdomen pain . I went to gastroenterologist. He suggested CT abdomen scan followed by endoscopy and colonoscopy. CT abdomen results are as follows:. Liver structure normal with increased echotexture. Mild diffuse fatty changes in liver . Mild thickening of terminal ileum and cecum due to ileocolitis. Endoscopy report was clean. Colonoscopy report was ulcerated Ileocecal valve with Friability. There were severe ulcers in ileocecal valve. Doctor suspected it to be ilieocecal tuberculosis and biopsy sampleswere taken. But the biopsy report stated that ZN strain for tb  tested negative for ACid fast bacilli..Lamina propira showed neutrophilic suppuration with Karyorectic debri and inflammatory cells.No evidence of granulomas/ malignancy studied in section . biopsy report supported non specific ileitis.I have lost 3 kgs of weight.Please suggest what this could be.