Need Help To Stop Freezing On Phone Calls

Need Help To Stop Freezing On Phone Calls I, 22, work in a hospital and . When i call my directors, i ALWAYS freeze and have to strain myself to push out words. I used to be better at this but with recent days, i’ve gotten much worse. It’s beyond embarrassing and i need ways to improve it. It’s very frustrating because i don’t have so much issue in person. Phones are the bane of my existence. If any healthcare workers can chime in, please do