Whooping cough

I have the whooping cough.
I am still coughing as bad as I was before.
I need more It will be one more month for until my coughing is cured. (my coughing goes away.) <― これはもっと分かりやすいと思います。でも、それは間違いじゃないです。

I am a little tired a little now.
I want to get well early soon. :)

Whooping cough

I have a whooping cough.
I am still coughing as much as before.
I need more than one month for my cough is cured.

I am a little tired now.
I want to get well soon:)

I am not a native speaker, but I tried to correct your entry as good as I can.