@rose
As the others have said this is part of it! You are at the other side of treatment, still a little in the what if, or perhaps what the just happened phase, as long as you don't dwell too much and those around you that think you look fine, what you were unwell, no you look alright to me! This link is from the BCNA website, hope it helps
https://www.bcna.org.au/understanding-breast-cancer/resources/accessible-resources/life-after-breast-cancer/Assessment of where you are at and where you are heading is perhaps being realized here; can't comprehend the comment "
and I've been told before that if I don't go for promotion, I'll eventually be sacked. Up or out."
Goodness that speaks volumes in itself - some of us find contentment in the work environment, some of us see it only as a means for income to survive and or lifestyle. For me, I am very fortunate compared to most, we have just retired, not old enough too, so we are self funded but that decision came about because of the hurdles of BC, all it's hidden extras that I have endured and the recognition of the stressful worklife. Time for us and our wellbeing. Medically I have professionals for that, emotionally, it is hubby and I and we are content!
Take time out for yourself where you can, even if it is just to walk out of the workplace at lunchtime and take up some Vitamin D and ponder. Do you still have leave owing that you could take advantage of to go and see a Counsellor and or have a break and then make a decision to stay and go for it or leave and be happy! A break away maybe all you need and you return with renewed vigour! You need to find an avenue to make it work
Take care and best wishes
BTW: "...she was very helpful. I know I could see her again - but I also feel like a bit of a fraud. .."
No way you are a fraud, everything is real and relevant!