I agree get a xray
this is a great site for you to read if she is indeed pregnant
http://www.debbiejensen.com/signs_of_pregnant.html
also find someone that can help you whelp that has experience.
here is what the pregnacy calendar says you should expect with the dates give or take a day or two...calculated from your date of May 14th
Fri 17 Jun 2005 The Dams abdomen starts to get larger.
Mon 27 Jun 2005 It's very easy now to feel the puppies, counting them might be a bit more difficult.
Thu 30 Jun 2005 -
Fri 8 Jul 2005 Dam begins to spend a lot more time in self-grooming.
Her breasts become even more swollen.
She may become a bit restlessness and begin to search for a suitable place to have her puppies.
Sat 2 Jul 2005 The dam might lose her appetite during this period. Her abdomen can be crowded with puppies.
It is better to feed several smaller meals spaced throughout the day.
You can easily detect abdominal movement now.
Sat 2 Jul 2005 -
Sun 17 Jul 2005 Nipples and vulva should be gently cleaned with warm water, you might want to trim the hairs surrounding the nipples, to allow easier access for the puppies to suck.
Tue 12 Jul 2005 -
Fri 15 Jul 2005 Milky fluid may be expressed from the nipples.
Wed 13 Jul 2005 You might want to start taking the dams rectal temperature each morning and evening.
Sat 16 Jul 2005 Twelve to 24 hours before she is due to deliver, the dams rectal temperature may drop from 101 to 98 degrees.
Clear discharge from the vulva might occur.
Sun 17 Jul 2005 Expected date of whelp. Of course this is just an average. Whelping may take place from the 59th to the 65th day. Puppies born before the 58th day will probably be too young to survive.