What do you think you can do while inside to help keeping yourself distracted because walking isn't always something that you can do..

Any breathing exercises ?
Music
Watch youtube videos .. Check out Tucker Budzyn, Hes an adorable dog and fun videos
what about reading?
Coloring or drawing
There are free APPs you can download on your phone, word games, there are some coloring apps .
Pick a vacation spot anywhere around the world and research all about it.
Watching movies you enjoy...

Basically its all about distraction. When I am in a bad place I have to find as many disttractions as possible , So I try dont work so I try the next..

Keep busy and stay safe