Anxiety (Caused by certain people)

Spend less time with the person who makes you anxious or set healthier relationship boundaries. You might want to abstain from discussing certain topics if you know that talking about them with that person will make you anxious.

Chamomile tea might help in calming you down. Some compounds in chamomile affect  the same brain receptors as drugs like Valium.

You can also take supplements containing apigenin (active ingredient) or dried chamomile flowers. According to studies there is a significant decrease in anxiety for the patients who took chamomile supplements for 8 weeks compared to placebo-takers. 

Few examples of chamomile supplements can be found here:

http://www.amazon.com/Natures-Way-Chamomile-60-Capsules/dp/B00014GAF4

http://www.amazon.com/Natures-Way-Chamomile-Flowers-Capsules/dp/B0006U3QJQ

When anxiety attacks, you may experience a mindset called "catastrophic thinking" or "catastrophizing." You think of really terrible, unbearable things and what if they really happen.

Take a few deep breaths, take a walk and consider the real chances that this problem will really turn into catastrophe. Most probably, a catastrophic outcome is less likely than you think when you're anxious.

According to research, heating up your body reduces muscle tension and anxiety. Mood-controlling neural circuits, including those that affect serotonin, may be altered by sensations of warmth.

You can lie in the sun on a beach, grab a few minutes of sauna or spa, sit in a hot bath or Jacuzzi, or curl up by a fire with a cup of tea.

Japanese researchers found that those who took a walk in the forest had lower levels of stress hormone after their walk than they did after a comparable walk in an urban area.

Studies show that L-theanine, amino acid, contained in green tea, helps reduce a rising heart rate and high blood pressure, and a few found that it reduces anxiety. In one study, anxiety-prone subjects were calmer and more focused during a test if they took 200 milligrams of L-theanine. This amount of L-theanine can be obtained from green tea, but you'll have to drink 5-20 cups.

For example, check out this L-Theanine supplement

If you seek immediate relief, take a medication. This list contains various medications, including Valium, Ativan etc. that can help you with your anxiety.

There are no over the counter medications against anxiety, so please consult with your doctor.