The days I feel like destroying the world I've created

Yesterday I skimmed through my synopsis draft. When I got to the end, I realized I was not happy with it--the ending (the synopsis too, but that's a story for another day). That was all it took for me to question the novel I spent almost two years working on, the novel I thought was one of my best. Now, there I was, thinking it was my worst. my husband did everything to remind me I'm a great writer. Well, he is my husband, my biggest fan. What else would he say?
I think the only person that can really motivate a writer, is him or herself. People can only encourage us so much. They can tell us everything we want to hear, but in the end, it's up to us to believe it. Most of the time I'm very good at motivating and encouraging myself, but sometimes, it's just so hard. Yesterday was one of those days.

My husband diligently listed all the reasons he thought I'm a great writer, I nodded--equally diligently--but my mind was far away. In the end, after thirty minutes of nodding and staring into space, I dragged myself off the couch and went to cook dinner. I was still not quite present, it's a wonder I didn't burn dinner. Later, after a hot shower I got it. The wrong man got the girl. I love both of the male characters that are after Nora, my protagonist, but there can only be one Mr. Right. I had given her the wrong one and I couldn't get a moment of peace until I did the right thing. If she's not happy, I'm not happy.

The blockage has been removed and the fountain of my imagination is flowing freely again.

So, that was it really. The rain stopped, the sun broke out from behind the dark clouds, and once again, I was the best writer in my world.

What do you do when you reach your low point(s)?