Out of the three speaking controlled assessments, are only two submitted?

My teacher said that we take three speaking assessments and then they decide which are the two best ones to send off to the exam board for marking. Is this true? I completely flopped my first one due to nerves and really want either an A or A* on the next two - if I do achieve A/A* on those will the low C not be sent off?

If this is for the Edexcel GCSE exams, then yes, just two are sent off.