Lonely, you doubt yourself because you have spent many years being trained to believe he is right and you are wrong, unless you agree with him.
No one can say "I'm intelligent and independent, and it would never happen to me". Yes it could, and sometimes I think the stronger and more independent you are, the more likely it is that one of these horrible arseholes will fix you in his sights. Higher mountain to climb, greater reward in defeating it.
So, for now, get a plan together. Talk to WA a lot, get as much support and advice from any and every source you can, get financial documents rogether, copies of P60s, find and hide passports, birth certificates etc.
How do you feel about telling people? The more people you tell, the more likely you are to find sympathetic people who can help you with practicalities.
Remember, it's not you, it's him. He's done this. He's the one who should feel shame and guilt.