it's kind of hard for you to get a 50. I got a 45 in Jan. and simliar situation as yours.
From your posting, I can tell that you didn't practice a lot, cuz for these who practiced intensively during the preparation, they have kind of sense of time..,
Usually, if you have practiced sufficiently, you can speak and at the same time take a look at the timer occasionally, moreover, you may adjust your answer according to the time left.