I have been on meds up and down for 6 months now. I was on synthriod samples but when I got the RX from the pharmacy it was generic. I was experencing lots of muscle pain in my arms, upper back, and chest at 75mcg on synthroid. I do ok for about 6 weeks then all the sudden I have no sleep, really bad sore muscles in my upper body. I get no sleep and feel like **** and want to stop my meds. I cant seem to get it right. are these symptoms due to much medication?