Take a moment to grieve the loss of your daughter. Take a grief class to help you process the feelings that are still affecting your well-being. Losing a child is life-changing, and it will always be a part of your being, so take the time to put it to a positive place in your thought process, and as you continue learning how to cope with the sensations that push your anxiety level out of balance fall into the balance that you get when you are comfortable. Yes, the more you panic, the easier it is to panic.
I will share my panic attack series in short, sweet, and simple words. I was outside, back yard, and couldn't move, couldn't breathe easily, and when I was able to do so, I got me a drink of water which soothed, put a cool cloth on my neck which soothed, and I told myself I was fine. This kept happening, and I went on medicine, which gave temporary relief as I learned tools to help me find my balance naturally.
I now use the back yard as my calming place, and just visualizing it helps me to be calm, no matter the situation.
Best wishes, you can do this.

A few days ago my anxiety went In a different direction. However, usually mine is exactly as you described yours, but, I rarely have them now because once I realized, despite how Im feeling, I'm not actually dyeing and the attacks did, or could do nothing other then terrify and scare me. I have been experiencing some weird anxiety over the past two days, however, thats just do to emotional stress. My advice would be to allow the attack to happen, and talk to yourself positively as it's happening "ok, you know nothings wrong and nothing bad is going to happen" "you know you're going to be just fine" "just take a deep breath". I believe that trying to ignore them only makes it harder and last longer, I learned years ago that acceptance and positive thinking is what helps. It's better said then done, nevertheless, it works magic after working at it for a bit.