My first panic attacks I had body tremors, my legs would shake like crazy! Heart rate well over 100 all the time, blood pressure thru the roof 175/100's. Put me on klonopin, which I hated but I at least got to sleep some. Got off that pretty fast. Put me on beta blockers, but didn't have high blood pressure so that feel to 45/40. Many trips to the ER since. Mine come from no where. And still does. I was a single parent, huge job responsibility, did 50 things at one time. Now, I am lucky to do one thing at a time but older and know to much stress causes me to go crazy again! Lost my job and all this started. Life is great now, but I can't go a month before another panic attack. I think I am find and wham, it starts all over again! I can get it back under control with little meds. .25 xanax twice a day for 3 days and all is good for about 4 weeks, then it creeps back on me and I still cannot feel it coming on until it's pretty bad.mine now comes with dizzy and nausea . All the test are find! I hate panic and anxiety. I can take one no-dye benadryl once or twice a week and it tends to help keep things calmed downIt is definitely tied to me getting enough sleep, not enough sleep and I will be in a tailspin ASAP!