Puberty hits around that age, and it can literally happy overnight. We have heard stories similar to this many times – a cuddly sweet baby girl bun (it’s almost always a girl bun) suddenly becomes skittish, fearful and antisocial, even aggressive (esp cage aggressive).
The screaming is a bit over the top though. Rabbits can scream and it’s dreadful. They do it when they’re really terrified. I assume you’ve checked out the foot you accidentally stepped on so it isn’t more hurt than it seemed yesterday.
Is she eating and pooping? As Dee says, offer a favorite treat and see if she takes it willingly. If she is refusing food and treats she should see a vet sooner rather than later.
ETA: In your other thread (I’ve locked it now to prevent confusion) you mention having pet another dog. https://binkybunny.com/FORUM/tabid/54/aft/163937/Default.aspx
So I’m copying what I wrote in reply to that info:
Sometimes if you’ve met another pet (although most often if the other pet is another rabbit) you need to shower and change clothes before the bunny stops acting scared. Rabbits have a keen sense of smell, even keener than a dog’s, so you can’t hide scents from them very well.