I Have Been On Livothyroxine .025, For A Slightly Elevated

I have been on Livothyroxine .025, for a slightly elevated TSH for 8 months , I have had severe muscel pain and weakness. double vision at night. and it elevated my once good glucose. I stopped taking my medication for 5 days and f eel great. Was it harmful TO STOP.all at once? I felt good before I took the medication. no bad symptoms.