Maureen began to feel nervous once she began organizing and writing her speech. which type of anxiety did maureen experience?

This is called "Preparation anxiety".
People have various kind of anxieties based on their experiences, nature and specific tasks, for example when someone begins to panic as soon as he/she is given any speech assignment to the class, this refers to pre-preparation anxiety. Anxiety refers to a feeling of nervousness and worry being uncertain of the result.