OP, it sounds like you are suffering from 'Status Migrainosus'.
www.healthline.com/health/migraine/status-migrainosus
I went through the same thing when I was 34: occasional migraines became chronic, until I was getting them almost every day, and often they would last several days at a time. I'd end up in A&E begging for pain relief (and not getting it). It completely devastated my life. I couldn't work, couldn't see friends, didn't enjoy anything. My life was just pain.
My GP prescribed a preventative anti-migraine pill (can't remember which), which didn't work, as well as triptans, which caused rebound migraines.
What turned my life around was finally getting to see a neurologist. He was the treating neurologist on duty one night in A&E, when I'd gone in because the pain was unbearable, and he said he'd take me on as a private patient.
He diagnosed Status Migrainosus and put me on a combination of amitriptyline and beta blockers. He warned that they would take some time to work, and he might have to change the doses or swap them out for other meds. He mentioned that in treating migraine, you often have to play around with combinations of different meds and doses until you get the right balance that works for each patient.
The amitriptyline/beta blocker combo ended up working well for me, but he did have to up the amitriptyline dose to quite high levels (150mg) before I saw real improvement, as the initial lower dose he prescribed didn't do much. It was so different to my GP, who threw two types of meds at me and when they didn't work, shrugged and basically said I don't know what else to do.
He also got me to keep a diary in order to discover my food and other triggers (caffeine and oversleeping were the two worst ones). He explained that the goal is to reduce the trigger load, so that the patient's brain calms down and becomes less prone to tipping over into a migrainous state.
It was a gradual process, but the combination of meds and cutting out triggers did reduce the frequency, length and intensity of the migraines over many months, until I was basically migraine-free. I have now been off all medication for several years.
I felt so sorry when I read your post, as I've been there and I know it feels as if this is your life now, that this will never end, but it's not true: with the right treatment you CAN get better and take control of your migraine condition.
The first step is to get yourself referred to a neurologist, as they are really the only doctors who know how to treat chronic migraine.
I also highly recommend this book: Heal Your Headache
It's by a neurologist at Johns Hopkins. He explains the mechanisms behind migraines, and how to interrupt them. I found it really useful for information about what was happening to me and why, and as a guide for working out my food triggers.
Best of luck OP. With the right neurologist and the right combination and dose of medications, you can turn this awful condition around.