Frustration

I'm deep in the depths of editing Dragon Slippers, and I'm about to give up and cry for mercy. My deadline is looming, my attention span is shorter than ever, and the doubts are coming thick and fast. Sure, this sentence needs work. But what if the 'fix' is just as bad? What if I shorten a scene that goes on too long, and then something later doesn't make sense? Whimper. I know I should be excited, since this is the first time I've worked with a real editor (and she's amazing, so no complaints there), this is the first time I've had a deadline. But editing really makes me tear out my hair and head for the cookie jar. Help me!