I am on 112mcg of Levothyroxine. My current TSH is 6.510, he is increasing my Levo. to 125, then another level in 6weeks. I am 52, workout, eat fairly well, weigh 148# with a BMI of 24. I want to know why this went up so high since my normal level last March. What things, meds., ect could have caused this. Thank you.