As you got down energy level with lethargy and tiredness
requires evaluation of your case.
Bleeding might be from piles, fissure or from intestinal tract.
Doctor will go for stool test
to find fresh blood or blood coming from intestinal tract.
They will go for hemoglobin
estimation as well.Chronic blood loss
can give you this problem.
After proper diagnosis they will go for treatment accordingly.
Ok and take care.