Yesterday, With No Immediate Reason, I Had A Panic Attack.

Yesterday, with no immediate reason, I had a panic attack. I was not short of breath, but my heart rate was 130 and bp was 180's/ 90. Resting heart rate is 60. I take 100 mg. Zoloft, 60 mg Cymbalta as of this month, 25 mg metaprolol, and 1/2 mg klonipin before I go to bed. My psychiatrist says not to worry, but it scares me. I think I am dying, for sure. Taking 1/2 mg. of klonipin generally helps it go away. This is the 3rd one in the past month. I do not do other drugs, smoke or drink, am not overweight, eat organically and do very little caffeine. I tend to scare my family with these too and I don't like to do that. I am 63 and have been on Zoloft for almost 20 years, have had OCD since age 10. Six months ago I switched from Zoloft to Cymbalta, but after the first attack my Dr. put me back on Zoloft which I have been on for 3 weeks. I manage a fairly stressful corporation, but as I own it, I am stuck in it for now. Don't seem to have any heart disease, except some aortic stenosis. Am I in danger from these attacks? How much. It is making me a wreck.