Opinions! Mental health and jobs

If someone (me) was having a really really rough time with there mental health, should they be allowed time off work even just a day or two?

My anxiety is the worst it’s ever been and it’s based around working. I can’t exactly pin point the problem. I have booked a emergency appointment with my doctor because I’m just not coping. I am having complete breakdowns everyday even on days I’m not working. Until I get into the doctors would you think it’s reasonable for me to having some time off until I can get myself sorted?

Ps. It’s actually only 2 days of work in between my appointment and now so I’m asking if it would be reasonable to not go that 2 days?

Sorry if I confused anyone