Hello there,
The symptoms you mentioned are physiological in nature. The basis of the physiological symptoms in your case is anticipatory and negative thought patterns. I suggest you to consult a clinical psychologist. A professional will help you to break these negative thought patterns and would help you to inculcate healthy thought patterns. As there are too many physiological symptoms it is necessary to settle down the anxiety. You can start practicing meditation or yoga, distract yourself by doing some activities, talk about your problems with your friends or family memebers, note down 3 negative and 3 positive thoughts during the day and listen to some soothing music. These tips can settle down anxiety for some time but you may feel anxious again. To completely eliminate these symptoms you need to work upon those negative thought patterns. But this condition is completely treatable.
Next Steps
Consult a Clinical Psychologist
Health Tips
Start meditation or yoga, listen to soothing music , talk to your friends or family members.