OK, I'm not sure whether to ask this question on r/advice or here, so I'm doing both. Basically, I have a presentation next week and I need a way to at least temporarily ease my anxiety. I need something that could help with the shaking, rapid heart beating, and basically anything that could ease the "heebie jeebies" for at least 30 mins. I really want to do well in my presentation. I've already done most of the things I need to finish. All I need now is to "fix" me.

any ideas? I really need help on this one.