I'm going to offer what I hope is a good analogy, but that's all it is, and you may not agree. in my world of atrial fibrillation, it is an accepted convention among those whose cardiologists agree to take a PIP approach to the infrequent, or occasional, bouts of the arrhythmia. PIP means 'pill-in-pocket,' where you take one that you keep for just this purpose in one's wallet or purse and hope it staves off a lengthy or particularly nasty run of the fibrillation. It may be that a suitable drug, maybe a fast acting one like Ativan, would work the same way for your purposes? If your inability to handle the anxiety is what almost always seems to encourage a subsequent migraine, or is merely a precursor, maybe it will help if you can swallow one within minutes and it could save your day. This would have to be flown past your physician, of course, but it may be something that is often practiced in your patient cohort.