Normally, a fridge should be left off for 24 hours once laid on its back. This allows for the proper distribution of the fluids within the fridge, such as the oil in the motor that keeps everything cool. That is what I have found out in my retail experience working at the accursed big orange box store, as well as my brother’s experiences at Lowe’s and Best Buy.I hope that everything works out for you. I would give it a day before I started to panic.