A few things. If you are keeping them together the cages should be no less than 6' x 6' x 6'. Veileds are very aggressive chameleons and males will often stress females through constant breeding attempts and just general territorial behavior that can eventually kill your female.
Breeding veileds that young is not a good idea. These animals produce a large amount of eggs in captivity and breeding animals young shortens their life span and can cause some serious health issues. Veiled females should be at the very least 12 months of age before breeding is attempted.
If she is indeed gravid she will begin to show a marked weight gain in a few weeks. Alot of people utilize the container in the cage method for laying but I have always utilized a 32 gallon trash can with a couple of feet of dirt in it. I have never had an animal with any egg binding issues.
There are tons of great articles at
www.chameleonnews.com, including a few on incubation, nesting sites and caring for hatchlings. Check it out and read as much as you can. Good luck.