This is a problem isn't it.

I can't think of anything to help so soon, but I would recommend instead of having 'emergency' anxiety medication, to get on a low dose of something that will lower your anxiety levels in general, but still give you some ups and downs. I say that because I found it helpful to know when things were going wrong for me, so that I could look into them, and have anxiety but not so badly, and slowly get stronger and braver over time.

Taking a pill in a crisis teaches you to take a pill in a crisis and just make the crisis go away. Lowering my general levels by 2/10 was a better outcome for me.

I get a lot of nausea and I find I can sometimes eat my way out of it by having a huge amount of food. Like baked beans, or cheese sandwiches. There is bound to be some food you can turn to when you have nausea that will quell it.

I guess what I'm saying is, if somebody came at you with a gun and said 'serve at the kitchen tomorrow or I shoot you' you'd find a way. What would you do to help yourself get through it? Do that.

For migraines I got a LOT out of chiropractic, stretching, hydration. Chiropractic has been key tbh.

Honestly honey it sounds like you should stay home. You have a migraine and you are going to be sick all day if you force yourself to do that. I do think it is wonderful that you are volunteering to help people. You have a huge heart. I guess my best advice would be to listen to your body and take care of yourself. I have a huge problem getting motivated to do anything and I don't go anywhere unless I have to. It sounds like you have a lot going on that's bringing you down and anxiety about going places. You have a good heart . Don't beat yourself up over it darling.

I volunteer at a local hospital at least 3 times (12 hours) a week to gain focus in controlling my anxiety. Somedays I am not entirely successful due to the real world politics of the work world. I re-entrench by telling myself why I am there )to help informed patients). The work with the patients is positive aspect that I use to balance my attitude. I am at a low now due to to med changes and am weak. Serving food is helping people like I am, acknowledge that as beneficial to your well being and come to regard other issues as structural and not your primary purpose. When the structural issues cross over and prevent you from functioning your best tell them. No need to talk about your illness with them but rehearse what you have to say and tell them. You both will learn.

So until you checked your email, you had this volunteer time already set in your mind as a personal choice obligation? Why did you volunteer? Not as a blaming thing, but because I want to know if it played a part of the migraine coming on.If it did, and it is entirely possible, then, why choose this?
I have done a lot of volunteering myself and fought through anxiety attacks after raising my pledge to do them. My pledge usually won out and I made it through it but only because the cause was something I felt strongly about. The ones I called in on, were ones that maybe to a degree I was volunteered for. I have migraines and bad headaches, I take enough meds to knock them down to a dull roar and do the deeds, then recover after.
I'm sorry your husband doesn't understand your fear and pain but that's because he doesn't have a reference to it. Pray he doesn't get one.
Hugs of support and hopes that your choices are upheld.
J.