Hey!
Well everyone is different, they do say generally you put on weight with Breast Cancer Treatment, but I guess there are alot of factors to it. I was always slim and I put on 5kg through Chemo and I wasnt even eating really but I was very ill. Im 9 months and cannot get it off, exercise is still very difficult due to side effects. I also put it down to being thrown into menopause for me as to the weight gain as well and inability to shift it. Either way they say it will stabilise itself again. So I think you will even out.
Melinda xo