I had the same thing happen to me a few times. I did something really hard at that point. I did a portrait in poser, printed it out on heavy stock paper and mounted it on a board. I then got out my oils and painted over it. It became like a paint by numbers thing. afterwards, I felt so relaxed, almost cleansed. can't explain it, but I was taking something I had done simply and remade it by hand..... have no idea why, it just worked.