Many years ago when I had a nervous breakdown and the beginning od P anic Disorder I used to have those feelings. They are real scary. I felt out of control of my thoughts and mind. I was afraid to die and was obsessed with thoughts of death. you are probably very anxious about something for a while. I took xanax then but the dose was not enough to keep the feelings away. It was only when the xanax was increased that I felt normal again. I now take 3 to 4 mgs of xanax per day...3 times/day. Its best to check with your doc tho and tell him how you are feeling. Hope you feel better real soon.