Well, reframe it as..."I can afford to take off 4 unpaid days for my mental health and well being." Because 4 days off work unpaid is an investment in you. Plus, you have control over your environment at home. You can come and go as you please and if you need to go see a counselor the week you take off, you can go to any walk in counseling center or make an appointment.

I wouldn't go to the hospital. I think that would be a huge mistake.

Come up with a coping plan while you look for another job, for your current toxic work environment. Take a week off, eat the 4 days of unapid work knowing it will not break you financially, and invest in yourself for just those 7 days away from your office.