Hi...lurker here who finally decided to just take the plunge and sign up!
I'm a busy working mom of three adorable young children (1, 2 & 5) and I have been dealing with severe panic disorder since I was 10 years old. I spent ages 10-17 thinking I was bonkers (thought my heart was going to stop, wouldn't go to sleep because wasn't going to wake up, constantly thought I had every terminal illness or disease, etc.) - although I managed to have lots of friends, make good grades, etc. all the while screaming inside. Off to college and my physical panic attacks began - couldn't breathe, dizzy, numbness of limbs, chest pain, you name it. At times I felt like I was living one big panic attack - they were incredibly frequent, multiple times per day. Still managed to make the most of my academic and social career while struggling internally. The attacks have grown more and more physical coupled with general anxiety as I have become older (in my early 30's). I often cannot physically function when having a bad attack.
Anyway, I have tried several SSRI's, SNRI's, benzo.'s & non-medical techniques such as breathing, meditation and distraction. The main reason that I have switched medications is pregnancy - I weaned off any med.s for each pregnancy with the *hope* that maybe, just maybe, the attacks would go away after the baby was born. Sadly, never worked! So I would go back on something else. I have really, really struggled to handle my panic disorder medication-free, but so far I have had no success. I have attempted to be medication free 6 times in the past 12 years and never made it past 6 months or so. It just adds to my anxiety that I can't control this disease by myself!
Currently I'm on 5mg Lexapro per day and .25mg Klonopin 2x per day - I'm a nervous wreck about becoming addicted or tolerant to benzos (latest worry!). It's so hard to look like I have it all together on the outside (great kids, great job, great husband, cute house, lots of friends, etc.) and be such a horrendous disaster on the inside 
I still daily think that I have some horrid heart condition & will drop dead from a heart attack or that I will stop breathing at a moment's notice - sounds so silly when I type that, but you know how it goes in your head!
Right now just looking for support, shared experiences and to listen to others who struggle with the same debilitating issues, particularly the very physical panic attacks and such.
Thanks for listening!