Hi I have been suffering from GERD for about a year. This made me feel heartburn twice a month at around 2 in night. This has been going on and off. Three weeks before, after a regular physical checkup, i was dignosed with underactive thyroid . My doctor prescribed synthroid 50. I am taking that for last 2-3 week now. However around the same time, my GERD worsened. I got a feeling of nausea at work, so came back home. Doctor said it is flu and take tylenol. I did that. things got better but last one week or so, i have persistent headache. this persistent headache is not making me feel normal and is not allowing me to work. Also if i eat normal diet, i feel heartburn, coldness in feet, and fatigue and tiredness. I had both endoscopy and CT scan done last week. Awaiting reports but gastroenterologist who did endoscopy said that it is normal and prescribed me ZANTAC 300 instead of pantaprazole which I was taking earlier. A detailed biposy report is still awaited. My problem right now is headache and gerd. not sure if all these 3 - thyroid , gerd and headache are related or not. Please suggest something