What's Wrong With My Frog?

I just got a Cuban tree frog, five days ago and it doesn;t seem to move around a lot. I turn off the light at night and then when i wake up in the morning he/she is in the same spot. The water dish is not dirty and the crickets don't seem to be gone, but i really can;t tell if hes eating or not. He/she does however seem to move around once or twice every couple of days but not every night. Is this stress is he sick, hibernation?? I am not sure, Please help