Rabbit does frequently do a thing called a false pregnancy. Often, they will stop at about day 21, but they may go "full term." A doe with a false pregnancy will go through all of the motions of being pregnant, even building a nest and pulling fur, but no babies are produced.
With most does, fur pulling only happens right around time of kindling. They may make a nest with hay or other materials, but the fur pulling only happens within hours or even minutes of the kits arriving. Some does will continue to pull fur for days after kindling, particularly if the weather is cool. IME, it is very unusual for a doe to pull significant amounts of her own fur more than a few hours before kindling (she may terrorize any cage mates by pulling theirs for days before, however). There are exceptions to every rule, of course. Out of hundreds of does that I have worked with, I did have one Jersey Wooly doe that started pulling fur about 10 days before she was due (about day 21). The first time she did it, I thought she'd had a false pregnancy, but she continued to pull fur daily until her kits were born. By the time she kindled, her cage was swimming with wool, and she was nearly bald! Moral of that story - know your doe.
If your doe put more than a wisp or two of fur in a nest more than 10 days ago, I think it likely that she had a false pregnancy.
