I personally think high levels and T and E in your system is a recipe for disaster. They would most likely counteract each other but having high levels of two hormones- especially ones that "fight" each other- could really upset your body and cause some problems. I'm sure some people's bodies have handled it fine, but each persons body is different.
I agree with others that since T helps shut down the ovaries while BC hormones prevents ovulation why need both? I would just use another form(s) of BC like condoms, diaphragms, etc. At least until a hysto... if that's something you want.