Thanks for providing some more information.
Hopefully your next cage is a screened one that is at least 18X18X36. Screened cages provide chams with the ability to choose which temperature they want, which is very important for them. I know it's dry, but there are better ways to contain moisture than to have a glass cage. Live plants are awesome for it, and I would suggest a pothos as they are very common, grow fast, and are very easy to care for. Some people will close off a couple sides of their cage with a shower curtain if they really have to. %50 humidity is fine as the regular humidity, but it should dry out (no water droplets on the leaves) between mistings.
Your temps could be a little too high for her, especially at that young of an age. Night time temperatures should go down at least 10 degrees for her to be comfortable. Also, if possible, you should lower your UVB to 5.0... the bulb you have may be disturbing her.
Young chameleons like yours should be eating as many small crickets they want for 15 minutes, 2-3 times a day. She needs plain calcium dusted (with no d3) on her crickets at every feeding. Calcium with D3 and a Multivitamin should be given only twice a month.
I would also suggest some more horizontal branches for her to bask on. It doesn't look like she has a designated spot to bask, which might be hard in the small cage she's in now.
I don't personally think she wants to lay eggs right now, but an egg laying bin is a MUST and you should do that as soon as possible, before she produces eggs and is ready to lay.