According to what I have heard, the speaking exam doesn't massively affect on you...
But just in case you redo it..Make sure you have everything written down if you forget it..And honestly don't care about anyone infront of you cause they really do not matter...
Just be active and try to kill the fear..
I recently came in to uk...English is not my first or not even my second language...
The speaking test was the first time I came out to speak in front of everyone...
I shook off my fear and nailed it!!!! I got distinction too..
just trust yourself!!! You can do it!!!