It is very important that natural progesterone be used with any form of estrogen. Estrogen without progesterone can cause endometrial and vaginal carcinomas. Estrogen blocks thyroid production and causes water retention. It can also cause fibrocystic breast disease and even fibroid tumors and cysts in the ovary area. Natural hormones in a cream or oil base come from Mexican yams, which is technically a food product.
Natural hormones are simply an alternative to hormone replacement therapy.
This is a perfectly normal response and is nothing to cause alarm. The progesterone is simply causing the body to rid itself of excess stored estrogen which can sometimes stimulate a uterine shedding - thus breakthrough bleeding. If this continues for longer than several months you should consult a physician. I have facial hair, especially above my upper lip that requires shaving occasionally. Progesterone acts as a regulator for the entire endocrine system.