I don’t know your history and situation, but I was in situation you’ve described here. In my case it was depression. Tales of the broken brain. I hadn’t any “real” causes to be in that condition (no problems with work, family or friends or money or health), yet I hadn’t energy and motivation to go out of bed.

But then I realised it could possibly be a depression, went to psychiatrist and got my prescription.

And it worked. After a couple of weeks that crippling attitude had went away. Now my past experience seems almost unreal to me.

Brain, with all it’s complexity is just another body organ, after all. It can malfunction.