Problems with Calculus

It seems like for me, the problems I have with calculus are deep rooted, on a genetic level, and no matter the amount of time I spend studying for a test I can't make a good grade. Neither of my parents are good at math, so it makes sense that I would have inherited this lack of skill in anything dealing with numbers. I try to look at it as a skill that can be learned and practiced like anything else, and with practice I should be able to get better. This is only true to a certain extent, and its frustrating that to some people it just comes easy. I have my skills and talents, this is just not one of them. I think I can only hope to pass the class, but I'm definitely not expecting an A.