Hello, Welcome to Health Care Magic

The symptoms like anxiety in situations of away from familiar places and occasional severe anxiety attack can occur due to Social Phobia with panic disorder.

Sudden panic with sweating in car or away from home are your main presenting symptoms. Weed or alcohol will not help you, instead they will make you dependent and will instead worsen the problem. Consult a psychiatrist for treatment.

For treatment of anxiety, social phobia medicines like Sertraline will prove useful. Other SSRIs can also be used. In events of severe panic attacks low dose benzodiazepines like Etizolam or drugs like propranolol will help. Visit a psychiatrist for detailed prescription.

Systematic desensitisation, relaxation exercises have good result in social phobia.

Thanks, hope this helps you.

Dear
Welcome to HCM
We understand your concerns

I went through your details. I suggest you not to worry much. Please understand that use of drugs and negative substances alter the state of consciousness for the time being and anxiety returns multifold later. Anxiety is fear of something which may or may not be true or may or may not happen in the future. Anxiety is known to produce so many weird symptoms which has no physiological back up. They tend to be just obsessive.

Start with these simple steps

Step 1 - Practice Deep and full breathing whenever possible
Step 2 - Drink plenty of water and fruit juices.
Step 3 - A Tomato a day keeps anxiety at bay
Step 4 - Exercise regularly

Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques.

Hope this answers your query. Available for further clarifications.
Good luck.