Okay, I just looked up the time requirement. Your disability has to be expected to last at least a year. I've read that in multiple places. I don't think I can give you a link right now because I'm on a tablet and don't know how.
define disability?

The Social Security Administration considers you disabled if:

you are not working, or you are earning less than the earnings limit
your disability is so severe that you cannot do basic work activities such as walking, standing, or remembering
your disability has lasted or is expected to last at least a year or result in death
you cannot do the work you did before you became disabled
your disability prevents you from doing other work
SSDI does not give benefits if you are partially disabled, or if your disability is short-term.
http://www.massresources.org/ssdi-eligibility.html

Well, .I figured out how, so there you go.