Any one experience TSH numbers that more than doubled in six months?

Hello - I am a year and a half post partial thyroidectomy. I have felt awful ever since my surgery - weight gain, exhaustion, muscle aches. I recently had routine blood work and my TSH has more than doubled in six months despite 75 mcg of synthoid. I am feeling more tired and more sore. I have a follow up biopsy next week. I just know the doctor is going to say everything is "normal" according to the numbers. Thoughts? Thank you.