Hey Sophie,
Presentations at work or any presentation in fact is difficult for many let alone if you suffer from social anxiety. You can be as prepared as you want but when it comes time to prepare you get the symptoms again? Super common. Don't stress to much about it.
Have you considered seeing a health professional (psychologist or psychiatrist) and receiving advice on therapy/treatment interventions? Medication may also be an option too. I do think this would be a great option for you to consider. These health professionals will most recommend using CBT (Cognitive Behavioural Therapy) and gradual exposure techniques.
You may also consider Mindfulness. Mindfulness is the process of bringing one's attention to experiences occurring in the present moment. I recommend you speak to a psychologist (get a referral/mental health plan from your GP) and talk about your options.
Unfortunately there is no magic wand. Don't we all wish we had a wand to just make things happen LOL. Try super hard and focus on breathing slowly and calming down even though it may be difficult.
Hope this helped.
Look forward to your replies.
Nick.
