I'm sorry you're having so much trouble with your chameleons.
It would help us a lot if you would not keep making new posts but instead just keep on with one thread for the same chameleons with the same issues so we can follow what's going on without having to re read many threads.
Mealworms are not the best choice for feeding chameleons. BSFL, silkworms, crickets, roaches, once in a while horn worms or wax worms. All the insects should be well cared for, well fed and gutloaded before feeding them to the chameleons.
Temperature plays a part in digestion...you need to have the basking area at 80F. I would recommend using a regular household incandescent bulb for this.
Your chameleons need a proper UVB light...most recommended...reptisun 5.0 long linear tube light or Arcadia 6% long linear bulb. It's hard to cause a vitamin D3 overdose the proper bulbs set up as
@Beman tells you. It's easy to overdose using D3 in supplements ...which is why we limit it to twice a month, lightly dusted on the insects.
PrEformed Vitamin A is another vitamin we can overdose them on which is why we only use it twice a month. PrOformed vitamin A (the other form of vitamin A) will not lead to an overdose but it's thought that many/all chameleons may not be able to convert it.
Calcium is important too, because most insects we use as feeders have a poor ratio of calcium to phos....so we dust the insects with a phos free calcium at all feedings but 2 a month lightly to make sure the chameleons have enough.
As for Macy...she may grow more if you get her husbandry fixed soon. What color are her urates (not poop) ...white or orangey?
If they are white then she is hydrated and you don't need to force feed her water.
As for force feeding her food, it should be a last resort. Try putting a cricket between her teeth while she is opening and shutting her mouth drinking...if you can get her to drink from a dripper. The dripper should only drop at the rate of one or two drops per second.
For a Pixie...I'm not sure why she's throwing up. I need more information...so more about that later.