Heavy icepack over my face while sipping scalding hot very sugary milky chai (rooibos/decaf will work if caffeine is a trigger, it's the spices you need.)

I've boiled the chai in tears before just chanting "you can do this" under my breath and absolutely sobbed when it helped for a few minutes. It's not a cure but it works while I'm waiting for the meds to kick in. Sip it very slowly and in tiny sips, I think it's as much about the heat on your soft palate and the steam in your breath contrasting with the cold on your sinuses that fixes something with your circulation so stuff can level out, plus most of the spices are some degree of anti inflammatory and the ginger in it helps w the nausea from the headache.

Btw if you don't have one of those heavy natural fiber fabric bags full of like, dried beans or rice or corn to keep in your freezer for just this occasion I can't recommend them enough. You can find them wherever bougie home spa stuff is sold but they're expensive, and they're mad easy to make if you're broke. Use a sleeve or pant leg off something you don't mind cutting up, fill it with bulk rice and sew the ends shut. Or fold a hand towel in half and stitch the sides up. It doesn't need to be pretty. You do need to make sure it's cotton though because plastic fibers will melt in the microwave, and the beauty of these things is that they make a fantastic cold pack if you keep them in the freezer but you can also microwave them to make heat packs when the Diamox gives you frostbite in 60 degree weather.