I have had chronic diarrhea, occasionally black for about 2 months now, I also have unexplaned bruising all over my body, and constant fatigue I woke up this morning with 2 round dark purple bruises on each side of my stromach, one which has a lump under it. I have had no appetite for weeks now, but are not loosing weight, today I woke with a very dull painful lower back ache.