If you get an SSDI attorney it's easier. My wait time was 7 months from the time I applied till the time I was approved. During that time my work had short term disability and I used my sick time and vacation time to make up the difference.

There is also the FLMA (I think that's what it is) the family leave act that will protect your job. There are to many people out there that are receiving SSDI or SSI and they are no where near has sick has you. Remember one thing. You have paid into this all your working life.