Yes, cats can certainly get depressed. Bless Lucy's little heart, she's been through so much. Having just come through a disaster, your finances may not handle a vet visit, but if you can swing it, I'd take her for a visit. She sounds like she needs some medication to get her through the rough time, that is if you're not opposed to giving your pets mood-altering drugs (they are quite safe, but of course your vet would know best). It sounds as if your whole family, pets too, need some prayer. I will put y'all on my list.