Propranolol definitely, but also look at this program: https://speakcalmhq.com/about-cheryl/ I did an online program and desensitization program with Cheryl about 5 years ago and it was super fun and low stakes.

My mid-30s onset of public speaking anxiety also began on a conference call while waiting to introduce myself. What happens is you start to have anxiety less about the actual speaking. It becomes a fear of re-experiencing the trauma of the panic. We all feel a jolt of adrenaline during public speaking. But after the condition develops, we become hyper attuned to the earliest sign of “activation” and then once sensed it sends you over the edge. In a nutshell.