Unfortunately, with Hashis, your levels can fluctuate quite a bit, and there are so many things that can help that happen. You should make sure you are taking your meds on an empty stomach, at the same time every day, no antacids within 4 hours, etc. Make sure your doctor isn't going only by the TSH levels.....if he/she is, then find another doctor ASAP.....are you seeing an Endocrinologist?