I have a mole on my right breast its itchy sometimes is that normal?

Not normal. A mole should not itch, burn, bleed, or weep fluid. It should never be painful. If it is any if these, please seek the attention if a physician to biopsy or remove the lesion.
May need removed. Itching and bleeding of moles are the top two concerns for possible skin cancer. See your doctor, it may need to be removed and tested.