Hi S.,
Congratulations on your baby girl! My child had a normal gestation and birth, and he didn't even start to roll over until he was 5 months. He took his time. It sounds like your little one has a lot of catching up to do since she had to finish her physical development out in the world. It's to be expected! And in one way... what an extra boost to have all those doctors and nurses and family pulling for her! It's an alternative entry to earth most children can't claim to have experienced.
A wonderful book that helps to look at the whole child with a unique perspective is "You Are Your Child's First Teacher" by Rahima Baldwin Dancy
http://www.amazon.com/You-Your-Childs-First-Teacher/dp/08...
It may not directly address your questions or concerns, but perhaps could help you see your situation in a more rounded view, and help you find ways to integrate learning in alternative ways to compliment the intervention you seek.
I would encourage you to relax, be the loving, warm mama that you are, and be strong. I know it sounds strange coming from a stranger who doesn't know what you went thru... but try not to allow "worry" to override any strong feelings you have b/c your little one will sense it and it may cause a sense of insecurity.
One other thing that comes to mind is that I keep my child dressed in "woolie" undershirts and leggings. I have a feeling that if a child doesn't have to fight to be warm, or put out extra energy to be warm, that the child can put all that energy into development. I see some children who appear cold or under dressed (cold hands) and I get the sense that they have to put a lot of work into maintaining core temperature. Also... organic wool has a wonderful property to it in that it "self cleans" and I rarely have to wash it. My little one "lives" in his woolies and I air them out every few days while he wears the second set. If they get soiled with pee I just air them out. Really! Only with poo or after a couple of weeks (uh... or months...) do I hand wash them and hang them up over the shower curtain rail. Very easy.
http://www.floweringchild.com/philosophy.html
I found this site... and they explain what I'm trying to say very well! And their products are exactly what I use... very soft European wool/silk. Yummy comfy for the child!
Another thing comes to mind: Weleda baby care products are organic and even biodynamically grown naturals. The baby care line uses calendula that has a warming and healing effect. We use the baby body wash/shampoo and the diaper care and the baby cream. I keep the sampler set in my gift drawer for new mamas and it's the best in the diaper bag. I'm trying to think of supporting the child from the aspect of the senses. I've heard the theory that many baby care products off gas and have chemicals suspected as being negative to the health of the child. The Weleda products are AMAZING.
http://www.saffronrouge.com/baby-care/babies/weleda-baby-...
http://www.saffronrouge.com/baby-care/babies/weleda-calen...
Best of all things to you and yours!
Lots of love, R.