Please do get an advocate! ONe of the best is ** You can google them. I believe they will not charge you unless you get a favorable decision. And then they just take it from your back pay. Dont try this on your own. And its true that at the first level nearly all cases are denied. I believe the % was around 79%. The 2nd level is also high - around the high 60s or low 70s. You have to be persistent and stay on task and dont think you can do it alone!

Good luck