I use the reptisun T5 HO and love them. You may also want to look into a solarmeter it does help to know if your light is putting out any uvb, i have had new bulbs that light and put no uvb out.
I have done this before , just apply gentle pressure on the skin under the mouth of the chameleon and have the syringe ready. They don't like to keep there mouth open long so be ready, and slowly feed her.
I use Reptisun 5.0 T5 HO with Lugarti T5 uvb light reflector and love the combination.
http://www.lugarti.com/reptile-lighting/135-t5-uvb-light-reflector.html#/40-size-48
Yea they look to be female to me. Also males wont go for so cheap. Here are two photos of males im selling and there 4 months old. you can see the difference.
I would call you vet and ask for liquid calcium syrup. I have used it on all of my pregnant females to make sure the get enough calcium. Also make sure you dust here food with calcium powder, i use Rep Cal green label.
From what i can see you need to add more Branches and cover so he will have places to hide when he feels scared and larger cage too. It should look like a jungle lots of places to hide, and when he feels safe he will come out.