
Hi Guest,
It looks like it!
Contact your vet to put him/her on the alert in case of emergency.
This first stage lasts up to 36 hours - she will most likely become unsettled, start shivering/panting, looking uncomforatble, trying to find a dark corner, and nesting. Make sure she's where you want her to whelp when this behaviour starts! Once she starts actively straining (unmistakeable) if a pup isn't born within an hour, contact your vet.
If you register with this site you can ask questions if anything happens that you are uncertain about, but of course your first port of call is your vet.
Good luck. :)