Interesting.. I have almost the same problem .. Maybe one should just go ahead and do what they need to do instead of waiting to feel like they want to do it.. Eh? Maybe you think too much of your own feeling and are in your head too much.. Who knows

I am not a doctor, but would suggest you see someone on this. It's possible you suffer from any number of conditions that could be causing this- perhaps a low-grade persistent depressive state so constant you can't tell when or if it starts of ends, a dissociative disorder, or even just being constantly overwhelmed. It could even be your hormones or blood sugar are off- so start with a complete physical, then move on to the emotional and mental from there. Whatever it is, don't blame yourself as lazy or intentionally non-productive- just see someone. It may be a long road of trial and error to figure it out- so be patient.

I say the first thing u did well is knowing u have a problem and want to solve it. Maybe list out why you don't wanna go to work. Do you like your job? Try to understand what your son represent to you. Is it stress related? What r you unhappy about in your personal and work life?

Maybe find internal peace before you understand external aspects. Maybe your should try meditation?