I myself
Вообще-то я и сама понятия не имела, что это за тетради.
Actually, I had no idea what those notebooks were either.
I don't even understand myself.
Впрочем, я и сама была ему благодарна.
Still, I was grateful to him myself.
Я и сама уже не понимаю, что говорю.
I don't even understand what I'm saying anymore.
I could have done it myself.
I find it hard to believe myself.
Я и сама не очень хорошо себя чувствую.
I’m not feeling very well myself.