Many people have social anxiety in this community, especially when they are in front of large groups. Have you always had problems with this, or have you just recently been experiencing this? I know many people that go to various groups that can help with public speaking or are there any social anxiety groups that you can attend in your area? For me, anxiety is so much easier to deal with once I learned more about it. It can be very confusing and quite scary at first, but as with all things, more we learn about something the less daunting it seems....keep us posted!
There are anxiety medications that can help you, but therapy may benefit you as well. Therapy can be a lengthy process and medication may be needed in the meantime. It sounds like you have some social anxiety going on which is very common. Anxiety can cause us to not breathe as deeply as needed, so pay close attention to your breathing and don't hesitate to take a deep breath even while talking. I would talk to a psychiatrist so the two of you can determine the best course of treatment for you, and he can also suggest the best type of therapist for you. There is help for this and you can either beat it or control it via medication. Whatever works is what you need to go with. Take care and good luck.
i would try talking to your dr about your anxiety sounds lie you have it bad off be easy with yourself there probably is alot beneath the surface you are not aware of bless you