I am glad to hear that Jenna is OK, but I am so sad to hear she is declawed It's just mutilation! It's not just like cutting the nails, it's cutting the finger tips. Do you know that? Would you cut the fingers of a human Declawing is forbidden in Europe (except for medical reasons), and I will never understand why it's allowed in US Here people even don't think about declawing, they are aware that cats can scratch things at home and if they don't like it, they don't take a cat. OK it's a big discussion and it's not the place to start it here.
I have no doubt you love your cat and you will take care of her. And as Gary said, at least she has a home, but I am just wondering whether you really know what declawing is?
And why do the vets do it?

And for the scratching, she needs to do it to "mark" her territory. You need to have enough scratching posts in the house so that she can smell that she is at home and that she feels safe. And you could also cut the nails a bit to make them less sharp. And teach her to use the scratching posts. There are many things to do before declawing...