Feed early in the day, not too much, and ensure basking temps are appropriate (80ish) and that she actually basks. Sometimes chameleons like to hang out under a bright light rather than the basking lamp. They need time and heat to digest things properly.
Keep an eye out either way! If you need help with understanding how much to feed, how to position your lights etc we have a husbandry form you can fill out if you haven't already.