I am in my 10th month of transitioning and for the past 4 months I have not been using heat on my hair. Just been doing twist outs, braid outs or using curlformers. My hair has been nice and soft, and has been growing. Yesterday I decided I wanted straight hair. I was on my 3rd day of a twistout, so instead of washing it and blow drying it, I just went from the kinkyness of the old twistout and flat-ironed it. Now my ends feel brittle! And it is only the parts of my hair that still have relaxer. Could I have possibly damaged that part of my hair?