Waking with a sense of dread is debilitating . . . upsetting at the very least. Experiencing that sinking feeling at any time will derail even the best intentions, erasing or seriously decreasing energy, motivation, joy or satisfaction.
Consider nutrition. Reflect on the last nourishment you offered to your mind and body. Supporting the organism you call 'yourself' with fresh food is imperative. And then there is sleep. How much sleep did you get before that sensation of self-doubt and doom crept into your psyche? Sleep deprivation wreaks havoc on the strongest mind or body.
Expectations of optimal function are unrealistic while abuse of the body is going on . . . the wall is the next contact, believe it. The will is extremely powerful . . . use it in a manner beneficial and supportive to the body or lose it.