I did not know I could be as emotional as I have become since developing cancer and undergoing treatment. Treatment is tough, a real trial for anyone to go through, and it exacts a toll. I would encourage you to talk openly with your doctor about your feelings and your overall emotional tone; it could be that you are developing depression in response to all you are going through. That happened to me and I somewhat reluctantly agreed to try an antidepressant (Remeron, which also helps boost appetite and makes sleeping easier). It has been very helpful: mood improved, became more like my old self, and was able to force more Boost in (don't be afraid of the supplements; of not using them much yet, they can be very helpful when eating solids becomes difficult). Best wishes.