my goldfish was injured today. How can I help her?

Yes I did post this earlier but I'm going to do it once more on the chance someone might know something that could help. My goldfish swam into a tank decoration that I thought was FAR too small for her to get into, and got stuck. She couldn't turn around and couldn't swim through, so I chipped away the decoration until I could free her, but now she has a scrape on her nose. This fish is hypersensitive to EVERYTHING. If I so much as top off the tank (with treated water that sat over night) she will get a fungus, so I'm very worried that a scrape will stress her (not to mention being crammed in that thing) and she'll be a diseased mess by tomorrow. I added some slime coat to the water, but is there anything else I can do to prevent illness or to help de-stress her? She's also missing some scales. Not a lot but I would assume, enough to let nasty things get to her (maybe 3 or 4, not in a group, but randomly on one side where she struggled to get herself free). Someone suggested aquarium salt, but with a wound I'm not so sure that would be okay. Any advice is appreciated.