Social Anxiety Disorder. Treated at all?

Since my childhood, I had this fear interacting with complete strangers and could never perform anything in front of the class. It haunted me till now, due to this I lost so many opportunities in my life. I will not be able to sleep the entire night before the day of interview and ran from most of those, before they call my name. I feel short of breath and will start breathing from the mouth and end up vomiting and will have loss of apatite and due to which I will feel dizzy for full day interview or first day of job. Now at my position I have to attend lots of meetings and every-time before it starts I will start getting this anxiety and which messes up my entire day and meetings. I forget everything I prepare and even if I drink water, I feel like a burp stuck in stomach and I get this vomiting like sensation and end up throwing out even the water. I feel like this is going to ruin my entire career. I know this is Social anxiety disorder, can this be treated at all? Please help.