I didn't know about SA or anything like that until I found this forum. I knew I was somehow different from others and made a lot of effort to improve and sometimes I can honestly say that the effort was superhuman in that I've gone on for days and even weeks with almost no sleep at all. I recall the worst was sleeping for two hours total for a whole week which is just a few minutes a day... and being depressed and fighting that depression and working hard.
I tackled the problem head on, because I never knew I had a problem in this. A couple of years ago, it came crashing down when the sheer pressure of a high stress, sociable job, conscription, financial problems... etc all come together. By then, I was really depressed and had made plans AND have made preparations to leave this world.
I've racked my brains to solve my own unique blend of problems and I've little doubt that most, if not all in these forums do that as well and have put in a lot of effort. All I'm saying is that if you want to try the 'exposure' thing, do it incrementally and don't just rush in headlong. Keep working on things and building your resources (inner resources, healthy coping mechanisms, actual skill sets... etc)