VET TIME
If she is pawing at it something might be stuck in the gum.  The tooth might
be infected or abscessed.  Cats don't loose teeth like us all the time some
times the tooth is pushed back up in to the gum or swallowed.
You need to take her to the vet it just might be a discomfort right now cats
a re notorious for hiding things.  And if  she is being real  squiggly  when
you try to examine the mouth  there is pain just not enough yet to have the
cat squall or bite

part of Phil's mini exam

Mouth and Nose
With your cat facing you, push back the lips to examine the gums and teeth.
The gums should be pink, not white or red, and should show no signs of
swelling. The teeth should be clean, without any brownish tartar. Sniff your
cat's breath; while a cat's breath is never pleasant, a strong, fetid odor
is
abnormal and may indicate a problem. Excessive drooling can also be a sign
of oral disease. Unless it is normally colored or marked with color, the
nose
should be pink, and there should be no nasal discharge.