I have my health insurance through my company and we got a notice late last year that if Obamacare is enacted, expect our premiums to go up approx 30%. Yup, thats more an $1 increase.
I was obviously using the $1 to make a point, not to say that's what one should expect realistically. I can't speak to your specific case, but on the whole, most increases in costs would have to be coming from what I would have to assume are results of continuing to use private insurers, allowing big Pharma to run this country and any other provisions that were not agreeable to right wingers to bring down administrative costs in the industry.
My main point is that if you took every person in the US, like all 330M of em and averaged their cost of healthcare per year pre Obamacare, including all the people for which it is $0, then the average cost after it is in effect, the average cost will be less than what it was previously.