If she is carrying lots of babies its possible that the pressure of them inside her as they grow is preventing her from breathing well/getting enough air. Chameleons will also open their mouth when they are not well. All we can do is take the best guess at it. I would say it might be time to take her to the vet...but then if she's close to delivering, that might not be the best thing either. Sorry I can't give you a better answer without more information.
Can you please fill out the questions in the "how to ask for help" thread at the top of the health forum?
Can you please fill out the questions in the "how to ask for help" thread at the top of the health forum?