depends on whether you are making a decision or waiting for a decision to be made by others.

It would be more natural for a native speaker to say, "I have been waiting for a decision since May 8th". or "There has been no decision yet. I have been waiting since May 8th." Hope this helps

okay, thank you anyway!

So you can say it "Since 8th of May, I have not heard any decisions" or "have not had any decisions" i am not a teacher though but I speak in English everyday. So I am hoping if a teacher reads my comment, he or she will approve of this.

I am waiting