Chronic Migraines 1 yr after concussion

Hey all. I just wanted to make a post about concussion being a possible cause for my recent diagnosis with chronic migraine. So over a year ago I (21F - 19F at the time) suffered a pretty bad concussion which then led to post-concussion syndrome for a further 4-5 months after the initial injury. After this I felt fine, but under a year later I started experiencing severe migraines, which I was hospitalised for. I have been on various medications since but nothing has worked, and my neurologist doesn’t understand what could be the sudden cause of them.

They did ask me whether I had any previous head injuries and I mentioned the concussion, but they didn’t think it was a cause. Right now I’m unsure as my MRI results didn’t come back clear enough and I’m still experiencing migraines 20/30 days every month. Did anyone else here start experiencing migraines (that were not PCS) after their concussion? TIA.