I know you have a lot of other things to do, but could you just try nursing her everytime for like 48 hours. That might be all she needs, just to know you are there for her, and if not anything else you try would probably take a couple days anyway.
Another thing is to start some kind of routine so that she can get ready to nurse and knows that you will. Like I always ask them to get my book and pillow. And because once I have those they can nurse sometimes just the knowledge that I am available makes them happyand secure enough that they don't actually nurse. Like they ask to nurse and I say "okay find my book", many times between where I am (thier mom who just said okay lets nurse) and where the book is, they find something else to do.
My other suggestion is to just hang on until spring. I can't wait until we can spend hours outside everyday again. I would bet that this will be over then.