I hate group presentations(Vent)

I hate group presentations(Vent) I just had a group presentation where i prepared 5/20 slides for me to talk about. Note it was in English which isn't my mother language so it gave me extra pressure lol. However when we did the presentation a group member (that was before me) kept talking even when my slides came on the screen so i ended up doing 2 of the 5 slides that i had prepared. I ended up stuttering even more than usual because of this sudden change. The teacher said at the end that i did not talk enough and now i probably have to resit the presentation. Life sucks man