I never felt that huge wave of maternal love for about 3 months.
DH and I married under the agreement that we weren't going to have children. 8 years down the line DH changed his mind and asked me if I wanted to try for a child and see what happened. It was a yes/no question and I knew that if I'd said no our marriage would probably have run it's course and I'd have to let him go, so that he could be the Dad he wanted to be but with someone else.
Anyways...I decide I loved DH enough to at least try this parenting thing..only the once mind you (we now have 3 DC's!) so off we go and start trying. 
Out comes my coil...two weeks later I am officially pregnant!
It wasn't supposed to be that quick, I was supposed to have time to get used to this baby lark, what happened to all the 'trying' to conceive??!
9 months later baby arrives....until DC1 was born I'd never even held a baby! This little person screamed - a lot, it pooped - frequently, it fed from me at all hours, it was sooooo bloomin' small!
I used to gaze into the pram wondering where the other Mums got this whoosh of love from, I was full of practical caring but just didn't 'feel' very caring/loving....until one day DC1 was shuffling/rolling about and nearly pulled something off the sofa onto himself...well there it was that whooshy caring gooey feeling, the awe at his strength, the wonder of him being soooo agile and I grew him (Go me!)...my baby the wonder child!
Anyhow enough gushing from me...
For me as I'd never intended to have children I think that it all happening so quick took me completely by surprise. I'm sure I was in 'shock' but eventually mother nature took over and I finally got the whooshy I love my baby feeling.
We aren't all made the same, have the same back story to becoming a parent or have the same time scales for our emotions.
I'm sure you will have your whooshy moment when you are ready as well. 