*Laurie,*
I am glad you can live alone. I used to live alone. I've been seriously attacked a couple of times since then. I have gotten worse and I have to have my German Shepherds and more around me if home alone... or walking alone.
The worst part is, I do not have my service dog (no dogs) right now. She has passed on. I am looking into another one, very carefully. I'm very careful about choosing a dog, esp. a German Shepherd. I want excellent temperament, etc. It will take a considerable amount of time.
My mom lives with us, so she is here even if H traveling. However, I am the family watchdog anyway, even if he is home.
I cannot have an inpatient sleep study because I am too hypervigilant.
I cannot sleep at night, often, no matter where I sleep. Home is better than away anywhere.
I am sorry you live with similar types of challenge, too.

WC