When I was working on my pilots license and obtained my first medical, I had absolutely no idea my apnea was a problem.
It's not the applicant's responsibility to know that it is a problem. However...
I was diagnosed with apnea a long time ago, the CPAP worked and had become a part of my life to the point, I sometimes forgot about it when asked if I had any medical conditions.
...it
is the applicant's responsibility to remember all medical diagnoses and disclose them. Since the form asks you to check yes/no to answer the qustion "other illness, disability, or surgery," you were responsible to check "yes" and explain in the block below. Forgetting is not an excuse the FAA accepts when it comes to your medical history and medical certification issues.
When I started out I did not lied or mislead anyone.
Intent doesn't matter. You either did not check the "yes" box for 18x or if you did, you failed to disclose an illness with which you had been diagnosed. From the FAA's perspective, you gave a false answer, and after that, the only question is how much they punish you, not whether you broke the rules.
First renewal, I was in shock, and made a bad choice. I shopped around a bit and did not disclose. I asked a retired pilot buddy and he told me that lying was the standard.
Unfortunately, the FAA does not accept "bad advice" as an excuse for violation of these rules.
I'd really like to do a lot more flying, buy an airplane, more ratings, but I can't see it without getting this straightened out. I see it as an insurance problem.
It's a lot more than that -- it's a serious avaition
legal problem with the FAA. Because this is now a legal, not medical problem, what you need to do immediately is contact an aviation attorney and obtain legal counsel on how to deal with it. Do not speak to anyone other than your attorney about it, as your attorney is bound by attorney/client privilege, but anybody else can be compelled to give evidence against you.
Your attorney may, by offering voluntary disclosure and some form of penance (you ain't gonna skate on this) be able to negotiate on behalf of an anonymous client a more palatable deal than revocation of all your FAA certificates, and at least in theory (based on what you said here about knowingly lying on subsequent applications), jail time or fines.
IOW...
You have the right to remain silent; exercise it, and whatever you do, don't compound the offense by doing
anything more in the way of lying or deception. You have the right to counsel; exercise it, even if it's gonna cost ya, chief.