Here’s a good place to start regarding the PTSD/SSRI:
https://www.faa.gov/about/office_or...an_Information_SSRI_Initial_Certification.pdf
You will need an AME who is well versed in the certification process for difficult cases. You will need every but of paper generated from your VA C&P exam(s) for everything that was looked at. If your .mil records have information related to the PTSD, you’ll need all the paper associated with that, too. You’ll need any other paper from counseling or treatment that came out of the diagnosis.
For OSA, you’ll need this done:
https://www.faa.gov/about/office_or...m/ame/guide/media/OSAInitialStatusSummary.pdf
You’ll also need paper from you machine to evidence what’s written in the form above. DoD and/or VA paper for the sleep study resulting in the OSA diagnosis will be needed.
Not every medical history is certifiable by the FAA; before you sit down with an AME for you exam to go live you will need to know with as much certainty as possible that your record is certifiable as the process is very expensive.
If you aren’t very certain of certification AND you and your primary doctor believe you’re healthy enough to fly, then go Sport Pilot. If you submit, denied, and your history deemed unable to certify, you will not later have the option of choosing Sport Pilot.
Oh yeah, the FAA will want to know about certain things that you had ever in your life. This is kind of like doing your security clearance, but instead of the last five or ten years or since turning 18, it’s HAVE YOU EVER IN YOUR LIFE HAD….
Good luck, be deliberate, and seek a very experience AME to consult with you before starting the process.