sorry to hear...
It sounds like bile not being reabsorbed, and passing through you. That burns, and looks greenish.
Food can actually slow the bowels and help to absorb (or bind) bile, but clear fluids cannot.
Try eating bland foods, as it sounds better for you than the clear fluids! I have the same reaction when my guts are very inflamed
Hope the biologics help with the inflammation.
All the best.