I can completely relate to your post. I have been feeling the same way for the past couple days. But unlike you this has happened to me before. I broke this cycle after my doctor adjusted my medications and added a few more therapy sessions into my usual routine. It is not easy to motivate yourself to approach the problem at first, but once you take that first step it becomes a bit easier. It is completely exhausting, I agree. It is insane how much mental illnesses can affect the physical fuctions of the body.
Best luck you,