Is my 3yo ready for pre-kinder? Need advice?

[Fire Fly]

Melissa, my Dd is similar in the fact that she doesnt take to me leaving her well. Not even with my mum who she absolutely adores!. She cried so much when i left her to go back to work for a short time, but mum said she just distracted her and she was fine with in a couple of minutes.
My DD has experienced some bad experiences from 7months to 12 months, with being in and out of hospital due to her hip being dislocated so because i was ALWAYS there for her, i became her security more so than normal.
DH cant put her to bed, i have to, he cant get her out the car if she has just woken up, i have to, he cant read her a book before bed, i have to. I have to do everything for her. Its a real struggle to get her to trust her father and allow him to do stuff for her.
She is 4 in march and i have only just enrolled her in pre kinder. I havent left her yet, we have had a few short days where ill stay there with her to make sure she is ok. And she is fine, while im there.
My advice to you would be, if you dont think she is ready then dont send her. These are special kids that need our support and if waiting another year is what she needs then so be it. Ive waited this long for good reason, and thats cause i havent felt as though she would of coped.
She is fine socially with other kids her own age, bigger boys freak her out for some reason but bigger girls she is ok with. And adults she is very subdued with until she get so know them, but even then she is never totally herself.
Next week i intend on leaving her for the first time, it will only be for a few hours at first then i will gradually extend it. I dont care if other mums dont do the same things with there kids, but this is how i do things with mine. I want her to be *totally* comfortable and feel safe with her surroundings.

Good luck with it all.

ETA i should add that i really nutted out alot of pre schools and made sure the number of kids there a day werent huge and that ALL the staff were accredited teachers, not just joe blogs of the street iykwim