There are others who can relate better to your circumstances but may I suggest that cancer does tends to bring out things that may have been adequately ‘managed’ before - there but under some sort of control. Fear, guilt (often unnecessary and almost certainly not effective) and depression are not unusual with a life threatening illness and unpleasant treatment. Cancer is never fair but it does seem doubly hard when you have to deal with old wounds and sadnesses as well as the more recent ones. Your oncologist is right (although your brain may be catching up with more than cancer) and seeing a psychologist is a helpful and productive thing to do. But it all takes time. Try to find one thing a day that brings or gives you pleasure - no matter how small. Sadness is insidious, it becomes normal. Small reminders that life can be pleasant, even enjoyable again, can help balance your feelings. Best wishes.
