How can I stop my cat from acting out with the new baby?!

I have tried everything possible, I had my husband run home his newborn hat to let her smell before we brought him home...and in the weeks before we had him we played baby cries off the phone and rubbed baby wipes on our arms to let her smell, etc.

Even had a baby doll that we went through a daily routine with and started giving her a little less attention so she would get used to it....

Now that my lil man is finally home she is using the bathroom outside of the litter box and vomiting in the walkways. She tries to trip me when I'm walking with the baby and even tries biting me.

What do I do?!?!