Headache related. I'm truly worried.

I have headache for the past 2 weeks mainly during day time between 11 am and 6pm. It seems difficult to even move my head. I have difficulty reading in screen ( both phone and computer).my eyes become watery while reading but when I keep my screen near my eyes I can read without any difficulty. When I tested my eyes they said nothing is wrong with my eyes. I'm currently taking medicines for hyperthyroidism. During my pregnancy I had hypothyroidism and after delivery I got tested my thyroid level was normal then after 6 month I developed hyperthyroidism and I have been taking medicines ever since. It has been more than 8 months since I have been diagnosed with hyperthyroidism. What should I do about my headaches sir. I'm truly worried.