Have you tried costal/diaphragmatic breathing? If it’s really just one or two sentences that you need to get out smoothly, with this breathing technique and some of the other suggestions here, I think you should be able to actuate a change. If you’re interested, I would be more than happy to practice on a phone with you. Just PM me, and we can work together on this. If you’re able to fix things on your own, great. But if not, please do contact me. This sounds fixable to me, and I would love to help. You can do this! And relieve yourself of all this unnecessary stress in your life.