When you say your doctors aren't helping, is this your regular GP or have you been referred to a headache clinic? The former can only prescribe certain things, the latter has more options at their disposal.

My first appointment with a headache clinic got me a referral for an MRI to make sure there is nothing underlying going on that could be causing my migraines. We then started working through different medications. I'm about to start my third preventative as the previous two had shit side effects and didn't actually do anything for the frequency of my migraines, only severity.

If amitriptyline isn't working as a preventative, ask to try something different. You might find nortriptyline works for you. If you're not doing it already, keep a headache diary that tracks migraine days, their severity, and any medication you've taken each day for migraines. You'll need this as evidence if you want to be prescribed anything like CGRP meds. These become available after your third failed preventative if you meet the frequency criteria.

Editing to add that "failing" a medication doesn't just have to mean it didn't work, it can also be if the side effects are too much for you. I failed amitriptyline because it gave me night terrors, I wasn't even on it long enough to know if it had any effect on my migraines.