He is threatening me that he is gonna take me to court to take the kids. I'm gonna look into a lawyer tomorrow. It worries me because he does make more money than me plus he said he would tell of my mental situation right now. Can they find me unfit because I'm in therapy for ptsd?
He is being emotionally abusive and he is trying to scare you into thinking if you don't come back you will lose your children. It is hard when someone has been abusive to you to think rationally. I find fear hard to deal with, but logically and rationally if you work this through with your psychologist I believe you will see that this is part of his bullying abusive behaviours.
He is threatening you because he increased the abuse of you from verbal to physical and you jumped ship. So he is returning to his verbal abuse to continue his domination of you. If you can get into a women's shelter it will put you in a position to get quite a bit of back up and assistance. Or get a legal person. Or get some solid domestic violence advice from the appropriate groups in your area. Even joining a domestic violence support group could get you some ideas on how to manage the situation.
It is definitely a good idea to get a lawyer to understand the ins and outs of your situation.
Reporting the physical assault and contacting the domestic violence support officer, if they have one in your area, would be a good idea.
I don't know what country you are in but in Australia it actually seems to go more in your favour if you are seeing someone that shows you are working on yourself and can back up what you have been going through in court. I presume that you psychologist would know about the state of your relationship with your husband.
Take a deep breath and realise that this is not 1950 where having a mental illness like PTSD could mean you lose your children. It is 2013 and things have improved considerably since the 1950s.
So take a deep breath and ring your psychologist and see if you can get some type of emergency appointment. Ring a domestic violence hotline or crisis line and see what advice you can get through them.
In the long run, depending on your situation you can also ring the welfare and explain your situation and say you are willing to let him see the children but you want to know how to get supervised access to make sure the children are safe. You can ask them about how to go about this. But get advice from legal people and your psychologist before you go along that path.
In Australia it doesn't seem to make much difference at all how much money he earns. I don't know where you are but you can find out if it makes a difference. I doubt it would as women traditionally have a lot less money after a divorce.
There are lots of advice here that I have given you, and some of it might be helpful and some of it might not. Just take one day at a time. Write a list of what you have decided to do and tick it off as you go along.