One of my gravid fat girls is actually wrapping her bowl, I have also had snakes shed 4 days before laying. I've also seen snakes rarely coil nice after ovulation. I've had several females eat after ovulation. Not every snake is the same. Watch the behavior, look at feeding habits, and look at how they build. Most snakes will do just fine regulating their temperature for proper development of eggs as long as there are options for regulating it. In other words don't worry about her behavior just make sure that she has proper conditions.