It looks like the fast and the cleanse are releasing lots of toxins.
Mucus discharge are common during fasts and colon cleanse. I am not sure about the bleeding.
SInce you are in the 4th day of the cleanse, I think it is good idea to keep the cleanse unless the bleeding is too much.
Once my MOm was cleansing and released a lot of clots, and she felt better after that.
Listen to your body! It always knows what is better.