Hello DH... Welcome to Anxiety Zone. My name is Chuck, and I am one of the Global Moderators here on the site.
I will share with you, something that my therapist and I discussed recently. Part of cognitive behavioral therapy (CBT), teaches you that anxiety, is "just" anxiety, and nothing else, and that includes panic attacks. She asked me, "Was there a time you could do anything and everything, and not have any anxiety over it?" The answer to that question was "Yes!" That being the case, with panic disorder, it is your mind that sets-up what appears to be possible triggers, like having increased anxiety during or after eating. It's like the adage which came first, the chicken or the egg? Anxiety came first, and your mind ties its increase or panic attacks, to a trigger.
Also, right now you are what is called sensitized. You are so into a hyper-anxious state, that small things that never bothered you in the past, can send you flying. I'll give you an example. When I recently was having 24/7 anxiety, if the phone rang it would make me jump out of my seat, and now that I no longer have 24/7 anxiety, when the phone rings it don't even twitch. Because of this hyper-anxious state that you are in, it would be best for you to do a number of thinks which will take a little of the edge off. Caffeine, nicotine (smoking cigarettes), and drinking alcohol, all increase anxiety in the long run. When I had 24/7 anxiety, I cut out caffeine completely. I had a cup of chamomile tea in the morning, rather than coffee, and it helped. I never smoked, but when you do, it might appear that your anxiety diminishes when you finish a cigarette. This only occurs because your body is addicted to nicotine, which is one of the most addictive substances known to mankind, and so you have temporally calmed your craving. As the nicotine wears-off, the anxiety begins to build again. And alcohol is a depressant, so it also temporally "numbs" the anxiety, but in the long run, makes it worse.
With your history, and what is currently going on with you, I suggest that you consider seeing a psychiatrist. Psychiatrists are medical doctors, so they can provide you with a diagnosis, prescribe medication if necessary, and set-up a treatment plan tailored just for you.
I hope this helps to answer some of your questions, DH. The very best to you!... Chuck