How to deal with insurance

Hello. I ended up losing my home at the end of last year and had to move my entire life halfway across the country to avoid being homeless. Thankfully I was approved for health insurance, but unfortunately my insurance has been rejecting my prescription.

I'm already going on 7 days with this current migraine, it alternates between different levels of severity as (several) HMs, with a whole bunch of ocular stuff thrown in between.

How do I go about figuring out why my insurance refuses to cover my medication? Not that it works 100% of the time, it maybe works just over 50% at this rate, but I can't get into a neurologist for another month minimum unless someone calls with a cancellation, plus I've been fighting trying to find SOMETHING that helps and my body just isn't reacting well or even at all to everything I've tried. I've been told to call my insurance and ask directly exactly why they are denying a medication and to have that reason noted in my chart, but with my luck, that'll just screw me over even more.

Made a post in here months ago, or responded to a few posts about a former med that I was on, I was told it was not a long term medication, but it took away my migraines completely for over 3 years. They took me off of it in June and I've been getting slapped with migraines almost daily since. It was a big trigger for my mental health when they were daily, I've just felt like the biggest pain in the ass because I am once again complaining about being in even more pain daily and my head is once again going down the path of not so great thoughts.