I also want to add that none of us are born the perfect mother, we all have to learn how to deal with a baby, that may also be scaring you.
I was barely 16 when I had my first. Did I cope - yes I did looking back - did I feel like I was a good mother, no I didn't. My mother was a useless mother, obstructed me more than helped, criticized me more than praised. Looking back I was a damn good mother to my baby, despite my very young age. I did everything right and loved my baby, kept her well fed, clothed, clean and loved. Did I make mistakes, of course I did, I am not perfect.
But it certainly didn't come easy and I was the talk of the neighbourhood for being a 15 year old pregnant slut..I had sex once, I was a virgin oh and yep I was unlucky lol...I wasn't cut out to be a mother at 16 at all.
A mother and baby placement would be ideal for you after the baby is born. You learn to care for your baby under the watchful eye of experts, in a stress free environment, they teach you the basics and they are there for you for support and counselling and it might just give you time to learn to love your baby, if the feelings you are experiencing are part of your MH status.
At least at the end of the time in the placement you will be better informed on making your decision, and they will support your husband also. It would be a kinder environment than the real world while you feel the way you do.
And yes being married to your husband means he is automatically the baby's guardian and he would have a say in what he wants for the baby, but again no one can make you want or care for a baby you don't want. While you're struggling at the moment remember it is also your MH talking too and making you feel the way you do, it may not be a real reflection of your mind usually.
I know you won't hurt your baby, you have made it so far, and despite what you are saying, you must care for him or her otherwise you wouldn't have reached out on here for help. Please get the help you need and deserve, even if it just reinforces your feelings are the correct ones down the line, there is no shame in that.
I wish you nothing but the very very best for the next few weeks and I hope you keep us updated when you can, with whats going on in your life and your baby's.Much love xxxx