Nervous for first meeting tomorrow?

Nervous for first meeting tomorrow? Hi! So right now I am interning in a lab and have to present the experiments/research I have done in the past few weeks for my first lab meeting. I just needed some last minute tips since my brain keeps having mood swings on whats going to happen. At one point im feeling as though Im on top of the world and can do it without pressure and then an hour or so later im freaking out. I also start speech therapy once this intern ends so I don't have that to help me now. Just wanted to get that out.