Web it up...symptoms are like many, many neuro problems....meaning= All Over the Map!
For many synthetic or natural thyroid replacement meds usually do the trick. BUT a word of caution? It's not like taking a course of anti-biotics and you are done, IT really means a rest of your life commitment to a med that will help you lead a normal life to a good extent. Further, from my own experience [and I've been on replacement meds for well over a decade?] do see if you can find the BEST endocrinologist in your region! While there are many astute internal medicine or GP docs out there? More like they aren't as thorough in this quarter as you might need.
Once on medications, at first, expect monthly,quarterly or semi-annual blood tests to track the effectiveness of the meds and the dosages. Over my 'hypo-t' life? I've had my med dosages changed at least 20 times in about that decade plus. It is a slow process, but it does work. Good luck! - j