Ugh!! Aestivation is the "DRY" season hibernation period. The frog is not aestivating just because it completely burrowed down. This is normal Pacman behavior. Aestivation is sparked by a gradule drying of the enclosure and cooling of the temps over a period of two weeks or so. The only way to "find out" that the frog is Aestivating is if you didn't maintain all proper climate specs and the frog covered itself in several layers of mucus and skin like a cocoon. This is called an epithelial sack. I doubt your frog was aestivating. This is more like resting or hiding.