[kortex]

I definitely relate to this. Have you tried Upwork or similar temp work? I know it can be rough in its own ways, but it was critical for me to stay afloat during a particularly rough period.

Your best bet aside from temp work is finding a company whose culture is very open and compatible to your neurotype. You may even find success working with or even for an NGO/company which works with disability placement. We call them "Disability resource center" here, the name may vary.

Do you keep a mood journal, or otherwise track your productivity? I'd try to track what causes your down periods in the hopes of mitigating them. But also I know how random and arbitrary the fluctuations can feel.