Snakes will shed when they grow. It could be weeks or months in between sheds. The fact that you now have her on a regular feeding schedule is the reason. She may go through a couple of shed cycles in a short period of time now that her body is being nourished and can grow. Just don't over-feed her. One appropriately sized meal every week will get her back on track quicker than you would think.
During shed, if you can keep her humidity steadily over 60%, all the better. When not in shed, above 50% will suffice. I try to keep my tank around 70% when I know mine is getting ready to shed. In some tanks, just adding an extra water bowl, or a bowl full of wet sphagnum moss is all you need to accomplish this. If you're having a hard time, try placing a damp paper towel in the hides every day. This will keep humidity high in the area the snake is, and won't dry out as quickly as just misting the tank.