help... what should i do... it seems that our puppy was overdoesed after my mom gave it a dewormer...it is unfortunate that there are no vet clinics open at this time...so i really need your help
should i feed it? or let it starve for 24 hrs?

If you are in the UK all vets must provide 24 hour cover either themselves or make arrangements with another practice.  You must contact a vet as this can be very serious.

unfortunately, i'm not in UK.  i can't bear
to think of what might happen to my puppy

Phone round and at least try and get some advise over the phone.  Here is a vet web site you could try emailing them, although I don't know what time of day it is there.  Give them as much details as you can as to what exactly your puppy has been given, active ingredients rather that trade names which may be different, dose, puppies weight etc.  They may not check their emails that often though so still keep trying to get a vet on the phone.