JKB, who wants this beer right now? You don't, you made that big plan, so it must be your AV that wants it. You are aware that this thought comes from your AV now, and that it has no control over you, you get to do whatever YOU want. You want the self respect and sense of achievement that comes with seeing this through.
Walk on by, do something else, and anticipate what you can have instead, things that will last you a lifetime. You recognize your AV clearly, so sit with it for a minute. It won't hurt even a little, and when it fades as it always will, you will still be in charge.
I remember that feeling of panic very clearly, and I was able to focus on my breath for a couple of minutes and it eased up pretty quickly. I bet you can do that too.
You can also tell yourself, out loud if necessary,'This must be that vertigo feeling'. Make that identification clearly. You can even smile at it too, out of pity, because that is all it can really do.
You got this one.