Anxiety is a complex issue. Anxiety is normal, until it is controlling your life.
The problem is that only we can control it, and control how we respond to it. We can spend a lot of time managing the symptoms, and while medications can be useful in the short term they will never solve your anxiety.
Where did this all come from? Often it is associated with an expectancy, or a hyper-vigilance regarding risk and/or harm that has its origins in previous trauma.