I would suggest talking with your primary care dr abuot it, it could be anxiety or something else not really sure, you didnt really say much into it to determine if thats what it is really. Do you have fears being around people? kinda need more info to go off of to know for sure whats going on.
Diane

sounds to me like you are suffering from socail anxiety but I could be wrong. Do you think too much of how others veiw you? Is there a problem at home or with your friends you arent dealing with too well? These are some things that can cause socail anxiety problems. I know I suffer from socail anxiety, I am deathly afraid of new places and new faces and cant seem to talk ( like my mouth is glued shut). Anxiety can come on at any point in your life. Like the other person said, it would better for you to go see a psychologist and figure out what the cause is. There could be many things. To help ease it, I always just took a deep breathe ( or two) and tried not to think about the situation I was about to be in. Or I would think about the people who care about me, or some place nice and that would help to ease the stress a little.I am sure you will over come this!