We all got through anxiety now and then. It is actually very normal. We get anxious whether its going for a job interview, meeting new people, or even an upcoming event that seems stressful. There are many causes of anxiety and it is okay and normal to get anxious or nervous.
However, it is not normal to constantly be anxious all the time. To a point where it disturbs your daily peace and is an interruption in your daily life. You can not be anxious all the time. You need a reason to feel anxious. If the anxiety is so strong that it is a huge interference in your life and it never goes away, then that is an anxiety disorder. Anxiety disorder is know to be the most common mental disorder when compared to the others.
The symptoms would obviously include constant restlessness, fatigue, stress, worry, your mind may race through unwanted thoughts. If this happens too often then those are the symptoms of anxiety disorder. Insomnia, trembling, palpitations, very poor concentration are the more severe symptoms.
The treatments are usually counselling or being medicated. I personally think that if you suffer from this, you need to tell yourself that you are going to stop and you will be okay. Many times we think that there's something wrong with us and assume we need to be medicated, however, often we are what we believe we are. If your mindset is to make yourself stop the anxiety or whatever the case may be, you are capable to do so. The mind is very powerful, what you believe is what it will be.