is my dog in early stages of labor?

Hi,

my yorkie has been restless most of the day and chewing on everything she can get ahold of.

she wants to be near me and stares at me. she has went behind the couch and when the other dogs fallowed her she wanted to fight with them.

there is no signs of milk yet though. what do you think?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References:
www.yorkietgfdgalk.com/forums/breeder-talk/28777-my-dog-early-stages-labor.html
animated sales videos