Hi Marianne
Even though your chemo and radiation finished months ago, there can be "after" effects from the orignal chemo. my "extra" symptoms lasted another 6 months after chemo, but were completely different to those while undergoing the treatments.
I had excess fluid, nearly 3kg worth, and my legs couldnt bend properly to walk, but one side of my body was bigger, very weird, joints ached, arm cording and my fingernails when funny again, it was not a fun time, and was advised that they do "eventually" stop. All I can say was 'eventually' was a really Long time 6 mths, grrrr.... when you think you should be feeling fitter and more active.
so it may not be the tamoxifan as the sole culprit
cheers Bardoe