Thanks for the replies. The temps are in the mid 70's in my room. My female is always hungry, when I get near her cage she gets her tongue ready to shoot at me.lol. SO I shouldn't breed her for awhile then because she is going to give a second clutch? The temps are cool in my room even going down to low 70's possibly high 60's so maybe the decrease in temps will prevent her from giving a second clutch? And how long till they give a second clutch? I need to know when to keep a sand box in with her

Thanks. Craig.
Adjusting the basking temperature is also something you should consider. Ambient temperatures a bit harder to regulate if you aren't going to change the entire rooms temperature. The decrease in temperatures will not prevent her from producing more eggs, but it's been proven to help persuade their bodies that it is not the correct time to. Lowering the temperatures, while still keeping within a healthy range lessons some of the stimulus associated with producing eggs.
I don't know anything on specifics of the chameleons biology in the area of reproduction to know how, why or if eggs are produce in waiting for fertilization, but this does not correspond with the theory of how food intake (immediately after conception) affects the amount of eggs produced, but rather suggests that the amount of food prior and leading up to the time of conception affects it. Maybe someone, can comment or link to a source for this. I don't know the ins and outs of the reproduction process, just that it's a good time. Hah.
Remember some chameleon species, C.calyptratus in particular does not need to be mated to produce eggs. Not even for their first virgin clutch. Females who have never seen a male will even become gravid. Amazing? Not really when you apply it to humans; as women have several hundred thousand eggs when they come of age, and one at a time is released into the fallopian tube waiting to be fertilized by a man. So, it just goes to show that bodies can produce eggs without mating, but in the case of chameleons, their bodies require a stimulus (excess food, climate imitating season changes, high temperatures, etc).
Chameleons as most animals, are opportunistic feeders. When food is around, generally they will eat as much is possible. In the wild, this would rarely present a problem, however in captivity where we offer the chance for our chameleons and reptiles to become lazy, overweight and out-of-shape, predator-free, unskilled hunters who have food handed to them on a regular basis, pretty much on a platter (or rather a bowl...) it can cause obesity, fatty liver disease, potential metabolic bone disease through excessive rapid development (needs study) and in this case, double clutching of eggs.
I'm fairly certain that eggs could be produced within weeks of laying, and so potentially around two months to laying again.
Lastly for your information, it is possible for Veiled chameleons to live out their life without ever producing eggs- and this is presumably the healthiest life plan for them. Kinyonga has managed quite well, having females live- what 7 years virgin Linda? and she has discussed this topic with me several times and I'm sure my females have been thankful for the rest after laying that it has given them.