What is the cause of my diffuse hairloss on my scalp, face, and eyebrows?

Hello.
You need to find a good dermatologist. If the current one can’t find an answer, then look for a second and even a third opinion. There are great dermatologist in Chicago. Feel free to ask if you need more information.
Once the doctor determines what is causing your hair loss, a solution will come up.
Best of lucks

As you have been advised, it is time for you to get an in-person consultation with a local dermatologist and get a diagnosis.  Likely, this is not a problem amenable to hair transplantation, but you never know.  There are going to be blood tests and at least one biopsy (if not more) to get to the bottom of this. There are excellent university dermatologists nearby you who specialize in hair loss disorders who can get you started.  Best of luck to you.

This requires an in person examination to review all your details and blood tests over the past 10 years. There are a few causes including various inflammatory scalp conditions, genetic hypotrichoses, as well as many others. The hair loss experienced last year could even be a second (different condition) than the main condition causing hair loss since 13. See an expert in hair loss. 

You need to see a doctor who can diagnose diffuse hair loss and eyebrow loss. There are genetic causes but more important there are disease causes and dermatologists often make the diagnosis, so see one