Intestinal issue. With greenishness.

I have been suffering from an intestinal issue since 3 years now it's not going away. I had a CECT scan a month ago in which it showed mucosal fold thickening in jejunal an ileal loop and 9 mm mesentric lymph nodes...i had my esr also increased that is 53 after the course of antibiotics I got normal my esr as 24, it became normal with rifagut and econorm, also calprotectin test was normal but again it started happening since 3 weeks so I started having econorm plus I am having mouth ulcers frequently...... my weight is also 38 not increasing......what should I do I am taking econorm daily and also having vit B12 my stools are yellow and thin with greenishness.....Please help...I am afraid of malabsorption...