I have been taking natural aromatase inhibitors - first, Indol3 carbinol and then DIM, advised by my naturopath. This is the ingredient in broccoli that is helpful against cancer. You might try that during your "vacation" from AI. I had my estrogen levels checked through a test that showed that all the hormones were being processed into "good" estrogen, and not the "bad" estrogen. Also my bone density is getting better, not worse.
I don't think most regular oncologists know about these approaches, but some do. Here's a site I just found, which has links to more information:
http://www.dimfaq.com/. I recommend getting an MD or ND's help, not just giving up your AI.
- Carol