The period of stress anxiety prior to speaking is called and it can begin as early as when the speech is assigned. (2 words

Anticipation phase is the two words

I think the answer may be performance anxiety 

hope this helps 

Doulingo is good. you can also watch movies that are in french, i am using this tactic  for japanese  and it a lot. listing to music with  french  lyrics would work well too because  you could absorb  the words while having fun.hope this ! : )