Could my dog possibly be feeling "broody" [see details]?

Okay so here’s the deal, just recently my dawg, 2yrs old, has been a bit more skittish than usual. When she’s out & about she’s her same usual happy bouncy energetic self. Indoors however, things have changed these past few days.
She “collects” each of her little squeaky toys very gently in her mouth one at a time, crying as she goes. Each toy is positioned where she sleeps, but her sleeping areas have altered as well. Wheras before she had maybe 2 or 3 places she’d sleep, it’s now up to half a dozen or so.
I’ve placed this question in general in the hope for credible suggestions/advice as to my hunch on whether she’s having a “phantom pregnancy.” Thanks in advance.