he says that he is worried something will happen to me and bump, which sounds reasonable but if I say so myself I'm quite a responsible person
This is exactly what controlling - abusive - men do.
They don't say "I forbid you from going out" or "I forbid you from wearing that outfit" or "I forbid you from seeing your friend Jane".
They say "I'd be too worried about you going out on your own without me there to keep you safe" or "I don't think that's appropriate for you to wear, people might get the wrong idea" or "I get a bad vibe from Jane, I think she's taking advantage of you".
I'm sorry you've learned this way, but at least you have the opportunity to get away now. It's standard for abusive, controlling men to change once the woman becomes pregnant - in their view it's harder for her to leave, so they can drop some of the pretence.
Abuse isn't about violence, or specific abusive language, it's about domination, power, and control. It is usually very subtle, and very gradual, escalating at certain trigger points like pregnancy and marriage (I.e. When they think you're well and truly trapped).
They always start out like an absolute dream in the beginning because a) they'd never get close to you if they started off the way he is now, and b) by starting off as someone who swept you off your feet it means when they descend into increasingly vile behaviour you end up holding onto the idea that if you change yourself enough to appease them then you can get back the mirage you had in the beginning - so you don't leave, and they get to continue being controlling.
You don't deserve to be treated like this, and none of it is normal or healthy or acceptable.
You might find the information course run by the Freedom Programme will help you to make sense of what's happened and why you're making the right choice to leave. It will also help you protect yourself from being mistreated in the future because you'll be able to spot early warning signs, and you'll have confidence in your own judgement about how you should be treated in a relationship.
Www.freedomprogramme.co.uk - it's confidential, free to attend, and they won't tell you what to do or make you share details. They just have really useful information they want to share with you (it's not therapy) about unhealthy, controlling, abusive behaviour, and what a genuinely healthy, non-abusive relationship looks like. (Someone else has mentioned the early stages of OTT perfection are a bit of a warning sign that something isn't right...)
Calling you insane for standing up for yourself against his appalling treatment would be another example of something controlling men do.