I'm nowhere near ready for my girlfriend to be pregnant
How are you going to deal with it?
I'm not quite sure, I'm hoping that she miscarries and doesn't bring the child to the world.
You should have talked about it with your gf. Instead of wishing that she miscarries the child , you should discuss this with your gf and explore if you can abort the pregnancy before it's too late.
I'm not sure if it will work. I am going to ask her to put it up for adoption instead.
Maybe you should have used birth control. Also you can try to get her to put the baby up for adoption as you said if she wants that too. Otherwise she might chose the baby over you in all regards.