I know that anxiety keeps you working. Sometimes I feel like I'm ready to burst. Yes, while anxiety is a normal emotion, it is possible to have too much. When anxiety is excessive, the ability to function will be compromised. The most common cause of anxiety though is when a person's ability to cope is exceeded by their stressors.
Stress is any physical or mental demand placed on a person.
Similar to pain, anxiety can be a signal to a person. That signal is telling them that their systems are being overwhelmed. The best way to deal with this type of anxiety is to both reduce stressors and increase the ability to cope. Ways to reduce stresses might include dropping course, cutting back hours on a job, or saying No to some social demands. Ways to increase coping ability might include exercise, adequate sleep, a healthy diet, improved time management, and increased relaxation time.