Sounds like nesting behavior.  You could still be a few days or a week out.  My girl, Rose, started nesting a week before the big day.  She also did not nest all the time.  She nested for a day, then went 2 - 3 days before nesting again.

Do you have a baby monitor in the welping room?  I went down to a thrift/goodwill store and got an old one so I could hear at night.

During the evening, when your female is laying down, relaxing, watch the area between her ribs and leg.   Eventually you should see kind of a roll go across this area, as the puppies should be starting to move into birthing position soon.

If you have been going on gentle walks, your female should start wanting to stay in your yard and not leave.

Pacing was another sign Rose gave me.  She just could not get comfortable starting about 2 days before.

Now is a good time to start having her sleep in the whelping room.  This reinforces the area you want the puppies to be born in.  Also, keep everyone but you and your 1 other person to help during the welping out of the room.  This is your girl's "spa" room. 

Have you started taking her tempature?  If not, start now.  You need a confirmed baseline.  This worked good for me to tell when the time got very close.
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Here are some tricks I learned during the welping:

1.  Set up a potty area in this room.  For 3 weeks after the welping, my girl had many inside accidents.  Having this area for her made my life easier.
2.  Have some vanilla ice cream on hand for the big day.  A bit after each puppy for your girl will help her.
3.  Let your girl do all the work; only step in if there is an emergency.  This is her bonding time.
4.  Your girl will likely indicate she wants to go outside during the welping.  Of my 9 puppies; 3 were born outside.
5.  Have lots of old towels available.  Pick up a fresh one each time she goes outside; this way you have one if she starts to have a puppy outside.
6.  Be prepared for a long day/ night.  Rose's 1st puppy was at 4 am and last one was at 10:30 pm. 
7.  Relax, relax, relax. 


I went through all the same anxiety with Rose's litter.  Best advice for your sanity... keep repeating to yourself "what will be, will be."  The more anxious you are, the more nervous she is.  Check out some of my earlier posts on this site.  I pestered the heck out of everybody here .   Many of them help answered the first time "Human" mom questions.