(Concern) Should I compromise and use sick leave?

I am an office worker working in the marketing department.

I have usually been in a satisfactory position due to my diligent and meticulous personality, but recently my daily life has become difficult.

Insomnia was something I used to live with constantly.

As concentration decreased and motivation waned, I initially thought it was just simple stress, but eventually I started to zone out more often in daily life, and I also made more frequent mistakes at work and received more criticism...

As this continues, my self-esteem gradually decreases.

It's even more discouraging and difficult to endure because the atmosphere doesn't allow for free sick leave.

I just wish I had a serious injury that could be seen with the naked eye.

Will I get better if I receive counseling therapy...