first thing is go according to your own treatment provider. if they feel you should fill out and submit the application then thats whats right for you.

second yes many people get denied the first time around. a friend of mine works for social security. they told me the leading cause for people getting denied the first time around is that they did not submit enough or the correct information needed to process their application.

those that give details, treatment providers, diagnosis's that are current and up to date, release of information, have their doctors fill out the appropriate forms, and see the treatment providers if social security has sent them a letter to do so, usually go through real quick.

the more open you are about you and your problem areas and you have the documentations to back that up the faster it will go through. Otherwise they have no choice but to deny the person applying because they dont have enough information to qualify the person.

maybe you can get the application and you and your therapist go through it together making sure everything possible that is your problem areas are included. that way social security will have everything they need to get you past the application process.