Sorry I haven't been around for a while. My mild depression turned into depression after my last post. It was awful. I felt so bad one day, as bad as the day my mother died, that I called my oncologist for help, since I figured it was the tamoxifen wreaking havoc on my hormones. She claimed it wasn't a common SE of tamoxifen (which is contrary to everything I've read). She suggested I go to my GP for an antidepressant. I mentioned that I read that many antidepressants interfere with tamoxifen. She said "Oh, yeah" in that way that people do when they forget something they used to know, but then she stated that the jury is still out on that. I'm pretty sure she's wrong about that (or the American Cancer Society is). So, I said I didn't trust my NP to prescribe antidepressants, and did she have other suggestions? Yoga was all she could think of.
In hindsight, she should have recommended a support group, or a psychiatrist, someone trained to deal with this, someone really qualified to prescribe drugs if that was really what I needed. I wasn't able to think of these options myself at the time, but shouldn't she have been? And now it's been a couple of weeks, and she hasn't followed up which further makes me think she's a bad doctor. I've lost faith in her. I'll be finding someone new.
On the bright side, the depression went away without drugs, cycling and massage helped, but I think my body just needed to adapt to the drug. I'm still losing weight, have joint pain, my hair is brittle, but no other SE's. I am back to feeling very lucky for my life. And, I rode fast and fearlessly on the last group ride. I didn't get dropped or anything. Yay me. 
I am sure the depression was related to the tamoxifen, and adjusting to the drug has been the hardest part of my treatment. I still feel lucky it's an option for me. But this part was hard.
'02 Eddy Merckx Fuga, Selle An Atomica
'85 Eddy Merckx Professional, Selle An Atomica
'10 Soma Double Cross DC, Selle An Atomica
Slacker on wheels.