I feel you man. I’m 35 and still have this fear on daily basis. But guess what ? Since 3 weeks, I have to call our clients, pick up the phone and speak in another language at work for 1-2 hours a day. Simple trick : My confidence went to the roof when I started saying my name when I pick up the phone. Since we all know that this is the most difficult thing to say. I guess when It has been said, it reduces my stress to a minimum level so I can concentrate on taking the time to speak. As example, if your name is John Doe, pick up the phone and say “John Doe” like they do in the movies. Since I started do this, I noticed more speech fluency and can also state my full name in a regular conversation. But don’t give up and practice. Another trick I found painful but it works: speak in front of a mirror. You’ll see and feel it when there is a block coming so you can understand how to avoid it by controlling your air flow.