I had similar feelings with Ds2, his entrance wasn't quite a bad, he was born with the cord wrapped tightly around his neck, and was blue not breathing etc. Very scary for us at the time.
When he was roused, and weighed he was huge, my previous 2 had been little black haired olive skinned rather beautiful babies.
Ds2 was 10lb 10oz, gingery hair, pale skin, looked like he'd done a few rounds!
I felt like I loved him, but it wasn't that overwhelming feeling that I had with the others.
When I came home, it was 2-3 days later, I was rocking his pram, looked in, and just got this smack in the chest feeling of absolute adoration for this huge vulnerable baby boy!
It was then that the feeling that something awful was going to happen started.
I kept thinking of terrible senarios, that he would die, or get seriously sick, just because I loved him so so much, more than it was possible to love anything or anyone!
If I'm totaly honest, at the time I felt I loved him more than I had the others at that age
I spoke to my mum about it, and some close friends, I was going to see the doctor, but over time the feelings eased.
Maybe it was the "blues" or because of the way I felt when he was born, I was over compensating subconciously or something?
Maybe it would be an idea to speak to someone about the birth, it sounds like it was very traumatic for you, I'm sure that "punch" will come soon, you need to let yourself know that she is here, yoou do deserve her, and try and believe that she isn't going anywhere!
I hope you find the help, and can get on with enjoying your LO. x