Had total thyroidectomy. Haven't taken meds in a year. Extremely tired, dizzy, numb and occasional blurry vision. No insurance. Should I go to the ER?

Why to ER. If you have NO insurance, you would be responsible for ER visit which could be extremely expensive. Your most likely answer is HYPOTHYROIDISM, and a simple blood test can confirm. Thyroid meds can reverse all your issues if this is the case. There are many clinics which take cash patients at very low cost.
You need. medical attention because you might have critical hypothyroid condition called myxedema. You also need studies to follow up on thyroid cancer.