Hi, when you think about it, we have just gone through a life threatening situation and now have to live with constant worry about the future, so It's natural to have these feelings I think. I have read that it is very common to keep it together during treatment but then have problems after.
I saw my GP who did me a mental health plan under ATAPS, which entitles me to free counselling with a private psychologist, which has been helpful. She has given me stuff on relaxation, mediation, positive thinking etc.
The hospitals also have counsellors but I did not feel a connection with the person there myself.
Also, if you are on tamoxifen, there is some addtional threat of depression due to the estrogen supression.
All the best,
Julia