I don’t know what your dentist is on (he must be high on something) to agree to remove all your teeth at once.
I had all my wisdom teeth pulled and they did that two per side, as otherwise the sedative would relax the tounge muscle, which might cause you to choke. After that I got sent home with a big stack of painkillers (NSAIDS, no opiates).
I’d look for a different dentist tbh, but thats a bit late now.