First have your puppy checked at the vet to make sure the cause is not medical. Then put your pup on a regular routine. When it's time for nap or bed, use a crate suitable for her size and keep it close to you so that she has your scent. Don't pick the pup up or she will understand that crying gets her attention. Put an article of your clothing in the crate as your scent will give her comfort. Add a favorite toy, a special blanket to lie on. Some people recommend a ticking clock which is supposed to remind them of their mothers' heartbeat, but I don't know if that really works. Give your pup enough awake time attention, start training her and give her exercise appropriate for her size and age. A tired pup will only be too happy to fall right to sleep without any comments.
