I'd give it another try or two just to satisfy that sick, unknowing feeling. Give it the best you've got and then you can rest easy during the long off season. It really sounds like you nicked her and it is very likely she will heal just fine. Sometimes when they bed like that between coagulation of blood and freezing temps their minor wounds will begin to heal quite rapidly. After moving about some and then bedding again you very possibly will find a clear substance with just trace blood mixed. We are similar when we nick ourselves on a sharp knife, once you get the bleeding stopped you will frequently see a clearish substance in the wound. I cannot for the life of me remember the medical term for the substance, but I believe a Dr. might call it serum. It acts as the bodies own anti-biotic agent if I'm not mistaken.