What does this mean i just turned vegan 4 days ago. and i have had a bit of tummy pain but it seems to of stopped but i noticed my urine and stool is like a lime green can you tell me why

If : If you recently started consuming high amounts of fruits and vegetables then you may be having a difficult time digesting these foods. Also if you are taking vitamins this can contribute to the color change. Usually discoloration in urine and/or stool is from food/substance intake that is high in vitamins or food coloring. It is hard to say. If the pain persists please see your doctor. Good luck.