Slave to the Sequel

I'm writing book 2, The Wolf King, as we speak. And I am suffering. When I finished the first draft of The Wolf Court I jumped into book 2. For me the first 10,000 words are a joyride. No pain, no stress, just pure words flowing like I'm high on brilliance. And then suddenly I reach 11,000 words an it feels like I'm breathing tar. Desperate for inspiration I re read what I've written, and discover to my utter dismay that my first chapter is terrible. Awful, makes absolutely no sense.
So I fix it. and by the time I do that I'm down to 9,000 words. Sigh.
So yes, Book 2 is kicking my butt, and I'm out of shape because I'm used to wrestling with the first book.
But doggonnit I created this monster and I will conquer it!