here's what I am worried about

I'm slogging through a story, 25K words into it and it's not coming together. I had a brief rant over it yesterday and one of my two crit partners who've been complaining about the meh story suggested I take a break and write the book of my heart.

I have no book of my heart.

At the moment I don't seem to have any particular books at all--not even of the liver or brain or kneecaps. I sit down and write because that's what I'm supposed to do. Then I end up with a slog, apparently. Soggy slog, a b...