You haven't done that to yourself. He's done it to you. It's the results of emotional abuse.
All those years he's been putting you down and chipping away at your self-esteem and getting cross/sulky/upset every time you tried to make a choice he didn't want/like. The behaviour he's displaying now won't be new, if it's there now it was always in him and I'm willing to bet it came out in numerous subtle ways you didn't pick up on. You've noticed now because firstly, you've time away from him while DD is at school or in bed giving you a chance to think for the first time in 5yrs and secondly, he's ramped up his behaviour so it's more obvious now.
Think back to how capable you were when you met him, doing everything, being everything, taking on the running of his life as well as your own. That's who you are, she's still in there and you can get her back in time.
Don't worry about feeling passive, you are where you are, for now. Use the collective wisdom of MN to help with the thinking and just focus on taking action. If you're unsure whether to act on something, consider first if any harm can come from it.
What happens if you gather financial information and do nothing with it? You end up with an organised bunch of paperwork and a good overview of where your life's at financially.
What happens if you see a divorce solicitor and don't get divorced? You spend a bit of money and gain knowledge which you can then use for the future if you change your mind.
If you prevent him coming into your home to emotionally abusing you further, what happens? You feel better and start to heal mentally and he can still see DD away from your home. He still has access to the home when you're not in there with your key in the lock (so he can't put his key in).
None of these things are harmful, so do them anyway. Even if, right now, you can't really think of a reason why.