Your very pretty lady does look a bit plump and I’m not sure what her colors are saying, but she could very well be gravid. I can’t see your lay bin and am I correct in assuming you have the bottom portion of her enclosure covered to give her privacy? Ideally, the lay bin should be around 12” wide, long and if possible, deep. You want to fill it to about 5-6” deep with washed play sand that is kept moist enough to hold a tunnel without collapsing. I drill tiny holes in the bottom so water can drain as needed. Sand only leaks until it is set in place. Of course, you’ll need to provide some stable ways for her to get in/out. I try to provide a stable branch or vine and also have a pothos hanging down into it just in case. The lay bin should be kept as a permanent part of the enclosure. Try to find where she normally poos and avoid putting the bin there.
Even though she may currently be gravid, she may not yet be ready to lay her eggs. No need to put her in the bin, alter lighting or anything else. She knows the bin is there and when she is ready, she’ll get to it…or she might choose a plant instead. Our sweet girls are sometimes fussy and unpredictable. In the days leading up to being ready, her appetite may decrease and she may start moving around more and exploring the lower area of her enclosure. At this time, get something ready to cover the bottom half of the enclosure to give her as much privacy as possible without blocking ventilation. One morning you’ll find she’s in the bin and digging. Do NOT disturb her for anything less than the house being on fire. She must have privacy and if she sees anyone, she may stop digging. She may dig a few different spots until she is happy with one. She may sleep in her tunnel or may return to a branch for the night. Keep your regular lighting schedule. If you hand mist, instead set up a dripper, but not over the bin. A plastic cup with a pinhole in it makes a great dripper. No need to worry about feeding her. The whole process can take a couple of days. You’ll know she’s done when she’s basking and all of her tunnels are well covered.
Feed and hydrate her very well for the next couple of days. Silkworms and hornworms are awesome at this time. Then, you’ll want to start her on ‘the regimen’ which will help reduce her egg production and laying and thereby prolong her life. Feed 3-4 feeders, 3 days a week plus occasional treats. Keep basking temp no higher than 80. It’s quite simple and while results vary, it’s very effective for most.
Signs that she is distressed an in need of veterinary care urgently are: lethargy - not basking, staying on the bottom or low in the enclosure, both eyes closed during the day, not eating or drinking (many chams are secretive about drinking though), ‘dropping’ eggs randomly around her enclosure, appearing to be straining to push and blood coming from anywhere. Too often chameleons don’t show any signs that anything is wrong until too late or close to it. This is why it’s important not to delay getting her to a good vet who has experience with chameleons, and if need be, can perform a spay surgery to remove the eggs and save her life. Always research and know the vets in your area that you may need.
Generally, as long as husbandry has been correct, the risks of complications with egg laying are reduced. Right now, as long as she isn’t showing signs of distress, give her time to be ready to lay. In the meantime, let’s talk more and make sure that all of your husbandry is as perfect as possible.