Hi, I Was Diagnosed With Hypo Thyroid Ism And Was

Hi, I was diagnosed with hypo thyroid ism and was put on 50mcg thyronorm. T3 and T4 was normal. After 6 months I repeated the test and the results were in the normal range, but I was aske dto continue 50 mcg thyronorm. Now I am experiencing severe headache and dizziness. Is this the cause? Should I continue taking 50 mcg