I think that one of the reasons people are questioning you is that you maintain you did the Clare's Law enquiry to protect your children.
In reality, you did it to protect yourself because his behaviour towards you was concerning to you (and I agree, it was).
And there is absolutely nothing wrong with that! You deserve to be protected as much as they do and ypu can't protect your children if you are injured or worse.
I think what people are struggling with (and I'm inferring this because I haven't asked any of them directly) is that you were concerned enough about his behaviour to make the enquiry in the first place. The title of your thread says that you were 'scared'. Your posts prior to the phone call indicated fear.
His behaviour was clearly concerning enough to you for you to he genuinely concerned for your well being and safety.
That behaviour hasn't suddenly disappeared. It hasn't been erased. It still happened.
But one call that said he's not been convicted of anything and you're blissfully happy with not a care in the world as far as he is concerned.
Now it's all fiercely confident talk about just protecting your children and how you'd do the same again in the future.
I suspect I'm a fair bit older than you. And so my words of wisdom are this. I've never once ignored a niggling worry, red flag, something that felt 'off' about someone and had it been the right thing to do. It's always come back to bite me on the arse.
I won't be the only one with that experience which is why you have disliked so many of the responses.