ScoobysTales

It is worth it to apply, but like others have mentioned, you really do need a diagnosis from a doctor (and having tests to go along with it would help).  When you submit your application, the date of its receipt is the date your claim officially begins.

While it may take more tests and visits to a doctor in order to really ascertain that you are indeed disabled and in real need of SSI, be aware that the Social Security System is having financial problems, and probably for that reason more than others, it is screening people very carefully. 

The majority of applications get rejected as a matter of course.

You have 3 times at bat:  once on your own, once with the help of a Social Security specialist attorney, and finally a personal appearance.

The attorney takes a portion of the lump sum benefit (determined by when you submitted the appplication), and that amount is fixed by law.  Therefore, they represent you for free (I think) and their pay comes at the end when yours does.