Im not sure you would want to use cayenne for vaginal bleeding as cayenne draws blood to the area it is placed!
CAYENNE—Dr. Christopher, a well-known herbalist of the mid-20th century, said that if he only had two herbs, he would select charcoal and cayenne. Cayenne is powerful in its ability to attract blood to a body part. Since it is the blood which brings healing, this can be an important quality.
Internally, it is useful for arteriosclerosis, arthritis, asthma, bleeding, high or low blood pressure, bronchitis, chills, colds, convulsions, coughs, indigestion, infections, jaundice, ulcers, and varicose veins.
Externally, it is used for frostbite, painful joints, swellings, and varicose veins. When added to herbal formulas, it stimulates the action of other herbs. It is a preventative for heart attacks, flu, colds, indigestion, and lack of vitality. It is good for treating the spleen, pancreas, kidneys and is effective as a fomentation for rheumatism, inflammation, pleurisy, sores, and wounds. It can be rubbed on toothaches and swellings.