Try other fields of programming as well. If you've worked for product companies, try a service company, or vice versa See a sleep doctor and get a sleep study

Try other fields of programming as well. If you've worked for product companies, try a service company, or vice versa See a sleep doctor and get a sleep study if they agree to it to see if you're getting enough good sleep (depression is often confused for "burn out", and is pretty reliably caused by sleep deprivation, which is pretty reliably caused by small children).