Her coat looks dead/molty based on the uneven color and how it's standing up on end rather than falling back and laying down on her body. Brushing her is just helping the coat turn over. You should see new fur growing in within the week.
Some rabbits get crazy molts where they will have bald patches, it's actually pretty common, you're doing the right thing even though it looks scary to us humans.
She might. Every rabbit molts differently. Some molts may be very intense and you'll see these bald spots. Others may be slower and you'll just notice less, long-term shedding.