Overwhelmed by Feedback During Practice Presentation

Hey, I’m at a chemistry summer program and I just gave my first practice presentation to everyone in my research group. While I was presenting, my supervisor stopped me at every single slide to give feedback. I went from being confident, to internal panic and trying not to cry during my presentation from all the super direct questions he was asking. I know it wasn’t anything directed at me at all, just trying to give constructive feedback, but I couldn’t help losing my confidence in what I’ve learned and feeling like all the hard work I’ve done in this project has been for nothing. I give my presentation in a week and I’m starting to get more nervous then I was before. Normally talking in front of people doesn’t really bother me, but I’m afraid I’ll have the same situation at my actual presentation and just fall apart.