Hi there!
It could be either of those things. The crickets should be no bigger than the space between her eyes. Has her appetite or activity level changed at all? Also, could you run us through your set-up so we can see if you need to make any adjustments?
What lights does she have (please be specific), and how close can she get to them?
What are her temps and how are you measuring them?
What is her normal feeding routine- calcium, vitamins, any veg, any live food other than crickets, etc.?