I wouldn't change my past at this point as the person I am now, at my current age. However, if I was still a young teen and didn't know what I would go on to do/have, I'm sure I would have wanted several things to be different.
I love my husband very much. What if by changing my past I never met him? That would be sad. But of course if I never knew of him and knew what a gift a person like him could be, I wouldn't miss him. No, I wouldn't want to go back in time, even despite the hard times.