Running on borrowed energy? (Where are you borrowing it from?)
Fatigue may be obvious or just below the surface, but you can't stop now. (Your world might fall and burn, without reasonable comeback or return.)
Maybe you don't need to run away. Maybe not all your work and life needs to stop. Perhaps a mindful double-click on the following areas might surface wisdom of where, when and how to rest:
... physical
... emotional
... mental
... social
... creative
... spiritual
... sensory
Double-click to surface clarity, then proceed to the follow-through.
Lead yourself well.