Lord, have mercy!
Did you talk to a doctor about these attacks? You know, sometimes very simple, common medicine can help. I am a university teacher and I know that some of my students have anxiety attacks during exams, or the day before an exam. Some of these students, after seeing a doctor, began to take a minimal dose of propranolol (10 mg) once a day, and the attacks ceased. (Propranolol is a beta-blocker, one of the most common blood pressure medications.) It's not a universal remedy, but I know for sure that it helped some people. Do talk to health care professionals!