Suu,
While in pre-op waiting mode for my third laryngoplasty, I was alone and planning for my wife to pick me up afterward, when the woman in the next room coded. She was in post-op recovery. Fortunately, I was pretty relaxed from whatever was in the IV.
Unfortunately, the memory stuck with me and I decided I couldn't face another laryngoplasty, especially since they had such a low level of effectiveness for me. So, when it came time for to get my BAHA implant, I knew I needed my wife with me and that I had to dig down deep to manage the anxiety. For me, this is involves preparation and focus on the positive.
When the time came I was relatively relaxed, despite the delays that we faced that day. (the implant had not arrived previously as scheduled. It ended being promised by 10 am and so our 9:00 am start time was delayed to couple of hours since I did not wish to reschedule.) The sad story is that my dear wife who is subject to anxiety attacks, had been having them for the previous two weeks and was in a full-blown attack on that day. She was attributing this to work issues, but finally admitted that being back at the hospital in the same surgery complex that close to the anniversary of my 32 hour surgery, in which the waiting was a nightmare, was simply too much for her.
I think anxiety and panic attacks are different for each of us. The same holds true for how best to deal with them. For me, the easiest thing to do is prepare everything I can in advance. I want to avoid any last minute looking around for things or questions about things that need to be done. I need to make sure my family can find things or answer questions in my absence. I see anxiety as not being so much about the unknown or worst cases of what may happen, but about how to respond those things. If I can prepare myself and others well enough in advance, and place my trust and confidence in those I am paying to take care of me, then I do pretty well.
I don't know if any of this is really helpful to you, I hope it is. The main point is that panic attacks are not abnormal and that perhaps you can find a way to understand them and then reduce them.
-Tod