I have aches and pains since the dose of Synthroid was increased?

Hello, I am a 69 year old man in very good physical shape, training since the age of 18 and a lot of sport. For the last 8 weeks I have been taking Syntroide: , following an annual blood test my doctor contacts me to tell me that my thyroid gland is at 29.70 and asks me if I am experiencing fatigue, hair loss, sore throat... I tell her that yesterday I played my field hockey game like every week and that today I did my 1H30 training like every other day (dumbbell) and I feel in great shape, ok she prescribes me syntroide 50, 6 weeks later after a second blood test the result is 14.60, she changes the dose to 75 BUT since I take the syntroide I have pain everywhere for example in the left humurus bone, my left hip that I used to have a little pain is now so bad that I walk with a lot of pain and sometimes it's the right hip, in short I really don't feel well, I see my doctor in 2 weeks and I intend to suggest to him to stop the syntroide, when do you think?