It is strange that she is just sitting there not using her hide. I would give her a few days off and leave her alone and see how she does. Are those heat lamps? She probably doesn't need them all she needs is a uth (Under tank heater). Also the cage might be a little big for her right now but it should be okay since she has been living there for a month or so.
Don't worry about the food, BPs can fast for several months and maintain their health. I wouldn't even worry about a missed week of feeding, just give her some time and see if she snaps out of it.