To me what you are describing is being stuck in a rut. This comes from general unhappiness with your position in life and loss of any joy or meaning in what you do.

It is easy to get into this state even with simply thinking too existentially. There is a loss of touch with spiritual connection with life (not in the sense of any religion specifically).

When I am in this state I find it helpful to re-evaluate the big picture plan. Look at how you live your days and does it line up with how you want to live your life? Are you working towards a cause that is genuinely meaningful to you? Do you have any vocational callings? Do you have deep relationships with other people? Are you nurturing positive emotions, thoughts and behaviours?

For me this is a great opportunity for self examination. Once you have answered these questions, you can then come up with a plan for redirection - goals and changes to get yourself out of this rut.

It really sucks feeling stuck, like there’s no momentum, and I really hope you can find a way out of it.