I can't say that this is something I've ever suffered from, but my two pennorth's worth would be to try and put sex work into context by not letting it be your whole life. It might be safer/better if, for example, it wasn't the sole source of your income, even if you just 1–2 days a week in a shop or office or something. That would put everything in perspective, keep you tethered to reality, expand your social circle, give you a change of scene etc.
The longer you spend only doing SW, the feelings that you're likely to fail at anything else will likely get worse, so it's either a case of a). sit down, plan, and work out how to achieve your other goals, with some timelines/targets etc., or b). give up, focus on doing SW as well as you can for as long as you can, and manage your money sensibly so that you can retire early and enjoy other pursuits. Or there's possibly a hybrid plan, e.g. doing SW 1–2 days a week only.
In summary, try to make sure SW doesn't define you.