A.,
Hello. This is not normal behaivor for a four year old. Not to scare you, but something is definitely wrong.
1.) Seek help immediately. Starting with her pediatrician or primary care physician. Whoever can get you in ASAP. They can guide you where to go or refer you if your insurance requires you to do so.
2.) Keep a journal of behaivor. This will help whatever doctor you see with the proper diagnosis. Keep it with you everytime you see the doctor.
3.) A child psychologist will see a four year old. Most doctors won't put them on meds, but they will see them. I have never heard of this before. Your pediatrician will know someone who will see you. Don't quit pressing for answers!!! This is for your baby!!! Raise heck until you get someone to help you and your child!!!
***When my son was barely five years old, they needed to test him for adhd, they couldn't do all the tests, but they did what they could. And tested him more the next year. I am sure this is the case with any testing they do. Doctors can usually make it age appropriate.***
The divorce you are going through is surely a factor in the behaivor, however, sounds like something other than just the divorce is wrong with your child. Please take care. My prayers are with you. E-mail me for support if you'd like. I'm happy to listen! ____@____.com
~Lee