@Brenda5 ....Wise psychiatrist it takes awhile for chemo to lift let alone effects of radiation etc Your body needs to adjust and heal.
For me I have joined meditation groups and found them helpful though not a cure. Perhaps the tears at night are a good thing releasing pent up emotion.
I have had anti-depressants in the past and needed them at that time. If they help you good.
The other thing that helps is focusing something you love to do .Anything that absorbs you do it . Jig saw puzzles computer games whatever just do it.