Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine you and obtain a history, I can not tell you what the exact cause of your symptoms is. However I will try to provide you with some useful information.
As you mention, Tourrette's syndrome typically improves and even resolves with age, but as you suggest, significant anxiety and stress can certainly bring tics out again. Tics only need to be treated when they cause social dysfunction or embarassment, which it sounds like is occurring with you. There are no known vitamins that improve tics. Treating the underlying anxiety will have two benefits: reducing the tics and reducing the anxiety! This should be pursued with a psychiatrist until the appropriate anti-anxiety medication is established. Seroquel was developed as an antipsychotic agent, but it blocks dopamine, and hence is effective in treating tics. Some of its other pharmacologic properties make it helpful in both anxiety, depression, and sleep (it is sedating). There are certain side effects with it, including parkinsonism or dystonia or other involuntary movements, and excessive sedation. The risks and benefits need to be weighed against each other. Continued discussion with your psychiatrist is recommended. Evaluation by a movement disorders specialist (a neurologist with expertise in tics and other involuntary movements) may be of benefit as well. Discussion of non-pharmacologic therapies for tics (such as habit reversal therapy) could be explored as well, as well as psychological counseling to help cope with the stress and anxiety (stress management techniques etc).
Thank you for this opportunity to answer your questions, I hope you find the information I have provided useful, good luck.
Sorry just to add one thing that I forgot to mention- the neurologist that I just recently saw mentioned seroquel? I believe that could help. He said there are some side effects and that he didnt want to start me on it without me speaking to my psychiatrist. I did speak to my psychiatrist who said he didnt really notice the blinking that much and to just stick with the meds I have. The neurologist mentioned possibly switching the seroquel with the ambien? I think its weird that the psychiatrist didnt really notice the blinking because I was seeing a psychiatrist for about a couple of weeks before I switched to this new one (the last one was really rude and nasty). The VERY first thiing the last psychiatrist asked me was how long I had this blinking tic. So I guess some people notice it more than others but he said it was VERY obvious.