My goldfish is injured.?

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 fugus, 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?