Hi luketheduck,
I'm so very sorry to hear you are having extended head pain, I know how frustrating that can be. If it is migraine disease, there is no blood test or image study to diagnose it. An accurate diagnosis is achieved once the doctor goes over your symptoms, discusses your medical history and gives you a complete exam. If you haven't seen the doctor I wound encourage you to do so as soon as possible.
GardensatNight gave you great information and here it the list of medications that can be used (IV infusion) to break a nasty migraine cycle;
Brand name Decadron, or dexamethasone
Brand name Depacon, valproate sodium
Brand name Inapsine, or droperidol
Brand name DHE-45 or dihydroergotamine
Brand name Keppra or levetiracetam
ketamine
lidocaine
Brand name Phenegran or promethazine
Brand name Regaln, or metochlopramide
propofol
Brand name Ultram or tramadol
You mentioned you've been taking "medications" to help relieve this pain. We can create another problem called rebound headache if we take pain relievers and/or migraine medications, whether they are over-the-counter or prescription, more than two to three days a week. The problem is if we are doing this we can end up in a daily cycle of endless pain and our migraine attacks may be more difficult to treat. When you get a minute, take a look at this information; https://migraine.com/living-migraine/stop-rebound-headaches/.
Let us know how you make out,
Nancy