If my companion puppy is bought in the United States, but resides with me in Canada (I'm Canadian), will he be registered with the AKC or the CKG? I don't plan on breeding, but may enjoy obedience, coursing or therapy work.
Did you confirm pregnancy? You need to get her to a vet. They will probably need to do x-rays and if an ultrasound is available then ultrasound to check heartbeats for fetal distress.
The following site has them at a reasonable price plus if you click on Color/Pattern choices at the bottom of the page, you can see exactly how to measure your girl to get the correct size: http://nu-nee.tripod.com/bb.htm
Whatever you decide to use try to remember that the likelihood they last more than a day is low unless you are incredibly vigilant. Personally, I gave up on the panties. The bleeding was never very much & Ella kept herself incredibly clean so I rarely saw or had blood spots to clean up. The worst were my sheets (yes, my spoiled B sleeps under the covers at my feet). I tried keeping panties on her but by morning they were shredded as well as sanitary napkin bits everywhere. It was cheaper just to change my sheets daily.