Thanks for these questions. LCSW stands for Licensed Clinical Social Worker. CSAC stands for Certified Substance Abuse
Counselor. An audiologist would be seen for someone that has hearing problems. A speech pathologist would evaluate speech and language problems. I am guessing, not really sure, that someone has referred you to them because you have either a speech or hearing problem and that either of these is effecting your ability to communicate with people or it could have something to do with your learning disability. Since you said, I have trouble communicating my thoughts, I'm guessing that is why you have been referred.
I would suggest, continuing with the disability application and process. While you are waiting for approval continue following the recommendations of the specialists already treating you. Having the disability in place would give you room to work on the rehabilitation efforts through the VA or the department of rehabilitative services. If you improve through the rehabilitation and therapy you may not need the disability anymore. I would see the audiologist and the speech pathologist to see if they are able to identify any thing they can do to help with your communication problems. I would also take the advice about seeing a cognitive therapist because they could help with the sleep but also with the communication problems. After seeing all of these people you will have more information about which way to go next.
I would continue with the disability.
Schedule with and see the audiologist and speech pathologist. See what they recommend.
Schedule with the cognitive therapist.
After or while waiting for the results from these professionals explore options with VA or Department of Rehabilitation Services for help.
All of these services should be at low cost to you if you use the VA and the Dept. of rehabilitative services. You may even be able to have the audiologist and speech pathologist evaluation as part of your disability application process.
I think you are on the right track. I believe all of these steps will lead you to a clearer path. I hope this answer helps. Please let me know if you need clarification.