Bert....I know this can be scary!
About 8 yrs ago (very rural area on the beach), I was asleep and woke feeling something go by my foot (my foot is my temperature control device...it peaks from under the quilt and comes back in as needed. I don't even need to be awake
). Anyway, I peaked from under the covers knowing that some monster must have crawled from under the bed. But in the dim light, I could see a bat flying around. What I finally did was get up with the quilt covering me from head to toe and ran to the front door and opened it. The bat was very cooperative and followed me right out the door. Was not attacked but was definitely followed closely!
The only think I could figure is that the bat came in via the chimney.
Hope you and the bat are healthy!
