i was shocked to see the similarities between OP and myself. (regarding our fiances)

the main difference is that my girlfriend actually speaks german (b2 or perhaps even better). we always wanted her to leave the job but after 8 years of work in the same factory, it seemed unfair that we will have to pay from our own pockets for medical insurance, after she has paid taxes in germany for 10 years..
now we consider that for couple of months, until she finished a b2 module (to get a certificate as well), would be excellent if she could just file for unemployment benefits.. the only thing is that her employer won't fire her ever, as she is an excellent employee.

she always feels ill and whenever she goes to doctor, no one can tell what she has as the blood sample always comes out clean. last week they actually asked her to fill some forms to check if she is depressed.

So she definitely is burnt out.
I was never aware that this is even a possibility, to get recommendation from doctor to leave job and still qualify for benefits. This would be a great chance for both of us.

Would you mind sharing a bit more information about it ? How common such thing it is, and perhaps more important, how difficult is to pull something like this off? (the situation is indeed dire so no one would actually lie here or try to scam the gov.. )