That sounds like a difficult situation to be in. When I can't go outside here because of the shelter in place orders, I try to do a mental escape, whatever lets your mind free while your body can't. For me that music, and reading old science fiction.
For the concerns about going in patient that's totally understandable right now. It helped me to make a plan for what happens if I get unstable, and who to call that knows my diagnosis and symptoms and can help me take the right meds and keep me safe. I wrote down a list of my doctors, meds, and dosages and starting reminding myself of coping skills I could turn to if I got worse. I second the above poster that said it might be helpful to utilize your therapist for finding coping skills.