I saw your comment from yesterday about the Rescue Remedy. Cats need different amounts of it to "work". A good place to start is putting it on the paws, but if that's not calming her down, and it doesn't sound like it's quite enough to work, try putting some directly in her food. Since she's got a good appetite it should be no problem. Mine didn't seem to notice any taste from it - or if there is any, they liked it fine. I'd try putting one bite of food down with the rescue remedy in it, then when that's eaten give the rest. One of my friends piles the food up in a little mountain and puts the drops on the peak, assuming the cat will eat that first.
You could try one drop first and if that doesn't keep her from becoming aggressive with your other kitty, try it next time with 2 drops. I think I mentioned yesterday that punkin took a full dropperful - about 4-6 drops, if I remember correctly. Anya zonked out with 1 drop - she's a small female about 7 or 8lbs. Punkin weighed about 13-14lbs. It's safe to give them and it might really help with your move.
After Punkin died we got 2 male kittens. One of them is especially aggressive with Anya and is always after her. I've given both her and him RR for a couple of weeks at a time, every day, to try to help them adjust. It's really helpful.
Good luck!