Can hair texture change back naturally?

I want to know if I can get my straight hair back. My hair used to be really straight and not too thin and very nice, though a little frizzy. I got it cut pretty short about a year ago, and grew back in stringy, ugly curls, thick, and way frizzier than it was before and it's just totally unmanageable. I didn't know this was going to happen when I got my hair cut, otherwise I wouldn't have done it. Is there any way to make it go back to naturally straight? If I cut it again, will it change it's texture again? Or is there any way I can at least naturally smooth out the curls into more of a wave? Anything would help at this point. Thanks. :)