I agree with LGray. I would also cover the sides and back of the tank with black construction paper or shelving paper or something similar to make it feel more enclosed. That with the crumpled newspaper inside should help. You could also use fake plants or a few more hides instead of the paper.

Also double and triple check both your ambient temps and your hot spot. Ella did this last year in her 20gal long and I discovered that the ambient temps were too warm for her. She had gotten big enough (she's a fully mature female now) that she couldn't properly thermoregulate in that enclosure anymore. I switched her to a 40gal breeder and bought 2 hides from Reptile Basics and she's good to go now. Obviously, that isn't the problem for your little one, but sometimes things can appear just right but not be. Triple check and think about things from your snake's point of view.