Ps this is my friends account/phone

When I have to talk to new people or go places my voice won’t work and I shake or go really cold and if it gets to loud I have to cover my ears. I was talking to my head of year to get my name changed and my friend (and the account owner) wasn’t allowed to talk for me and I felt like I was gonna cry/scream. I honestly don’t know how to calm down after that (thankfully panic attacks are rare though).