I have headaches daily and get killer migraines more often than I think is right. I think it's hormones.

Here are my tips and tricks, take a nice warm bath, scoot down and get your head under the water, leaving out just your nose and mouth. Breathe calmly but deeply. Try not to freak out from the pain, it just makes it worse. Use candles in bathroom for calming effect. A hot shower with the water on your neck/head can work too, but not as great as a bath. Next, ICE PACKS might be your best friend. I buy those reusable ones you keep in the freezer. They have pouches you slip them into and Velcro straps do you can wrap it around your head, neck or both. I have several ice packs at the ready at all times. Last, I have some special lotion (liniment cream by mountain Magic) it's expensive but works for various problems including headache.

I've used Imitrex in the past with not too good results. My doctor just doubled the dose so we'll see how that works. The self care I listed above are my prime go-to's for headache/migraine.
Best of luck, I know how terrible it is.