How can I get my ringlets back?

Okay so first things first. I have hair that has soft curls and ringlets in it. I absolutely love it. But, because I got this new totally amazing straightner, I just HAD to straighten it. So anyways, now it seems like the temperature I had used to straighten my hair was a bit too hot. I straightened it two days in a row, but that's it. Now though, I don't have my ringlets anymore! I still have the soft curls at the top and stuff, but the hair at the bottom that I had insisted on much more, it's kinda stringy and straight and wavyish. I just want my hair to be the way it was before! I think that the temperature I used was way too hot, and I regret it now. Do you have any advice as to what I should do? Natural hair masks or such? By the way, I am obviously not going to straighten it anymore, like ever, so don't say that I just shouldn't straighten anymore because I know that. Okay, so please and thank you!