Help! what is wrong with me?

You might be bipolar....if as you say somedays you are talkative and creative, others you are anxious, others depressed. Zoloft and other antidepressants don't have much of an effect on bipolar people...maybe this is why zoloft isn't working for you. For your extreme social anxiety you should try a low dose of ativan or other benzodiazpine when you are in those anxiety inducing situations. You should really talk to your psychiatrist and tell him all of your symptoms. I'm sure you can start to feel better it just takes time to get the right medications for you.