I think it is probably a combination of sleep deprivation and fatigue from the stroke, but I think you are feeling the effects of lack of sleep first/worst

I remember you mentioning scheduling an appointment with your pdoc. Do you have one yet? Do you take the Doxepin for sleep? Would you be interested in adjusting the dose, or trying a different sleeping pill?

I hate that you are not sleeping. I'm sure it's contributing to your depression

Can you start reading instead of watching so much TV, or are you having too hard of a time concentrating?