Call your doctor and request your FT3 and FT4 results. Be sure to also ask for reference ranges as they vary lab to lab and have to come from your own lab report.
Many doctors think that just because they are "normal" (in range), you are fine. This is not the case.
Do you know if you have Hashi's?
I don't have my free t3 or t4 but the doctor said they were normal. My tsh was .1 now I have been on .75 levothyroxine down from 125 for four weeks and no real change.
Can you post your latest lab results including Free T3, Free T4 & TSH with the reference ranges? I had muscle twitching and cramping when hypo. I also have blurry vision when hypo and my allergies get worse. TSH is not a good indicator of thyroid levels. More important are the Free T3 & Free T4. It's very important to find a great dr who knows this.