her2 and tomaxifen vs. arimidex

[panicked911]

I as wondering if anyone was taking tomaxifen who is her2 +++ as well as strongly estrogen and progesterone + . My oncs originally put me on tomaxifen 2 moths ago and I have been able to tolerate it very well.
When I went for my weekely Herceptains, she said based on what she heard at San Antonio she wants to switch me to arimidex.
While I will do what is best to prevent a reoccurance, I am very reluctant to switch as i have had a really good reaction to tomaxien and have been able to tolerate it very well. I actually feel really good since I started taking it and i am deathly afraid of the side effects of Ah's as i am only 44 and receiving luprene shots.
Any advice anyone has would be greatly appreicated