[ElaineM]

Some labs can do blood tests for the various kinds of estrogen in our bodies. I don't remember the name of the actual blood test. Maybe if you do an internet search for something like blood tests for estrogen levels you might find it or you can ask your physician. Even if that person doesn't immediately know he or she might be able to check for it in the physicians desk reference or check online. Doctors have online sources of information we don't have sometimes. The trick is finding a doctor interested enough in your case to be willing to do a little extra work on your behalf.
Several biopsies with complete pathology investigation over time might also show a difference in estrogen levels.
Many foods (not only soy) can either increase or decrease estrogen levels in the body. I suggest you do an internet search or work with a nutritionist, an endocronologist (spelling?) or a naturopathic physican on this.
Also carrying extra body weight can increase estrogen levels, because estrogen is generally stored in body fat. I slowly lost 55 pounds on purpose over a period of 9-10 years with the help of a naturopathic physican. That helped everything !!