Situational anxiety and public speaking for work. Has anyone sought CBT for this or other therapies?

[Trampauline]

I've put this in Work rather than Mental Health since it is specific to my job. I have to speak before a large committee once a month of less, I give a presentation and then will be asked questions. My problem is my nerves often get the better of me. I can start out confidently but then my voice will become strangled until I am struggling to speak. I then manage to get through the rest of my presentation with a very croaky voice and by sipping water. It is so embarrassing, and the anxiety that this might happen is adding to it.
I have spoken to my GP, but unfortunately I can't take propropanol as I am already on another beta blocker for a medical reason. She referred me to mental health services and they have given me Anxiety UK and NHS Mind Matters to try. Before I stick a pin in one, has anyone tried therapy to help with public speaking?

I tired a kind of hynotherapy and public speaking courses. They didn't help me.
If you're already taking beta blockers - do they slow your heart rate? If they do, could you possibly speak to your dr about taking them before your presentations? That's all propranolol does and it's very effective.

Hi @BlackSwan, I'm on bisoprolol and it's to keep my heart beat regular I suppose. I'm on it because I had a bad episode of SVT years ago now. I don't know how the beta blockers differ, but they must. I'm on the lowest dose and I take it in the morning, so I could maybe take another tablet before the meeting. I could check it out with the doc. It might help. Sounds like you have only found medication to work.

Hey, giving this a little bump because I have the same exact problem! It's a really strange one because, like you, I start out confidently then just progressively get worse with the strangled voice and I don't understand why. The anxiety doesn't help but I don't think that's the only cause of it because I quite often don't feel that nervous which makes it all the more confusing! I'm not on any medication and don't want to be just for this so hoping someone will be able to offer advice on any therapies or exercises that might help. Was thinking of CBT or something like that?