Drinking before a presentation?

Hey guys i’m in uni and we have to do a lot of presentations. I’m a pretty social person but CANNOT public speak. I get so sick from anxiety it feels i’m going to die, and even if i prepare a lot, once i get up there my mind goes blank and I stuff up my words. It’s just horrible especially because it’s not just the people watching me, i’m also getting graded. Has anyone had a bit to drink before a presentation? If so how did it go? I’m only talking like 1 or 2 drinks. Alcohol always calms my nerves and gives me confidence, so I just thought should i try this?

Also which do u reckon would be the best alcohol for this? Saw someone said fireball