Sounds pre-broody to me. They can be in quite a temper before they settle down into a nest for a good long (21 day if they hatch) brood. She might also be molting and in a terrible mood from the prickles (check her).
Some hens will become discouraged from brooding by constantly removing the eggs if their brooding hormones aren't very strong. Others, well, not so much. I prefer to use my broodies for the business they were meant for. Many choose the "brood buster" wire cage to allow air circulation to cool them off. Although stubborn ones will simply go back into brooding at the first chance.
It totally depends on the genetic make up of your bird as to how serious into brooding she'll be. Watch her. If she gets serious, she'll be in the nest pretty much 24x7 fluffing and clucking at anything that comes near her. At that point you can decide what to do. Break her...or put some fertile eggs under her.
If you decide to use her for hatching, come back here to the Brooding threads and we'll explain the best way to do it
What breed is?
LofMc