Trust my, you are not the only one. Been there lots of times. I try not to work with deadlines. That makes it hard.
Maybe take some time for that bath in Calgon then organize your stuff by priority. So often, all it takes is one little seam to get me going again. On the other hand, if your schedule has been that full, maybe you are burnt out. That happened to me once after I'd just published my 5th book. It took me almost a year to recover! So be careful not to take on too much.