I'm assuming that you are talking about a veiled chameleon?
Its quite likely that she is getting ready to produce
eggs...or that she has already started to produce them.
The fact that she isn't eating and is anxious could mean that
she is getting close to wanting to lay....but it might not be
either. Is she plump? Does she ever turn almost black in the
background?
If you don't have somewhere in the cage for her to lay the eggs.
I would suggest getting a place ready for her...or you could be
heading for trouble. I put a container that is big enough for her
to fit into with some room to spare filled about 3/4 full of sand
in the cage with all my egg-laying females. This gives them some
place to start digging to show me when the female is getting
ready to lay eggs. When she starts digging in this container, I
moisten the sand and get ready to move her to a bigger container
that I have ready and waiting. The bigger container is a 65L
rubbermaid container that I've modified the lid of. The
modification consists of cutting a large hole in the middle of
the lid and covering it with screen so that I can place a light
or lights over it. I then put a bag of washed sandbox sand in
the rubbermaid, add a branch and moisten the sand so that it
will hold a tunnel when dug in it. I place the chameleon into
the rubbermaid when she is almost ready to lay the eggs...and put
the lid on an a light over the screen on the lid. She can be fed
and watered while in there...just don't leave any insects that
she doesn't eat in there...they might chew on her or the eggs.
Having to breed her so she won't become eggbound is IMHO and
experience, a fallacy. IMHO...egg binding comes most often
comes from bad/poor husbandry, misformed eggs, eggs that
are too large from delaying the female from laying, not providing
a suitable place for her to lay the eggs,internal deformities
in the female's reproductive system, etc.
I have had many veiled females over the years that I
have not bred until they were over 2 years old....and had no
problems with them laying infertile eggs.
Regarding delaying the female from laying her eggs....this
happens if you don't provide her with a suitable spot to lay
them...or if she sees you watching her when she is digging the
hole....so as tempting as it may be...don't watch her!
As for the stores not being able to sex veiled chameleons
(assuming that you are talking about veileds...they can be
sexed the day that they are born by the tarsal spur (males)
or lack of it (females).
Good luck with her!