You know, I think I know exactly how you feel!
I have had German Shepherds for over 30 years, that's all I've had, and there wasn't one I didn't bond with either immediately, or within a week. They are a breed of dog that is just so deeply ingrained in my heart and soul, it's not funny. It's also kind of hard to explain...
Due to family reasons and making a final decision on what is best for all of us, I walked away from the German Shepherds and have embarked on a new breed - the Newfoundland.
As much as it pains me to say this, the truth remains that I have not bonded with this puppy to any degree such as I always have with German Shepherds. Yes, it's worrisome, yes, it's stressful, yes, at times I feel bad and wonder what's wrong with me.
But I also am old enough and experienced enough to give myself a break and realise that things will happen in time. Bit by bit, I expect we will start bonding to the degree I normally do with a dog. I also realise that at this time with my children still home from school, I am finding it very difficult to do anything with Inca, and so all the issues tend to 'escalate.' I believe that once the boys are back at school and she and I have some quality time together to play and train, then things will be much better.
Believe me, I do understand how you feel. Just give it time.