I just discovered this forum and it's like I've finally found a voice to what I've been suffering for the last few years. I suffer from exactly what you describe, having been fine until the last 3 years, where upon my symptoms slowly began and increased until they're constant and unbearable. I have been diagnosed with chronic daily migraine, and suggest you consider looking into the same.
I have been seeing a private neurologist (due to waiting times for NHS in UK) in order to be prescribed a treatment called AJOVY, which cannot be prescribed by a GP as it is a new treatment (the first of its kind specifically designed to target migraines). I am on my first month of the treatment and beginning to see results. Those I've spoken to say it is life changing once it takes full effect.