Blurred vision unstable unbalance motion

It's been a month,it all started with a Severe headache as if a sinus or migrane then third day it was gone followed by blurred vision near is more blurry, my vertebra, bone at the back of neck stony and paining as I lower my head. This has led to unbalanced walk, unsteady seems I will fall. This situation is always there. I have thyroid TSH is 8.81 since 3 years, adenomyosis diagnosed last year, slightly high Cholestrol diagnosed few weeks ago and 10.02 haemoglobin I am taking iron tablets and calcium D3 too. Thyroxine 50 MCG. Please suggest a remedy for this problem as I feel less confident as I have a feeling I will fall if I start walking. This neck bone at the back is giving trouble it's too hard and stone like. Is it a cervical it spondylitis kindly suggest me.