I recently had a yearly check-up; my internist decided my Synthroid dose was too low. She prescribed 9 pills/week - she has me taking 100 everyday and doubling the dose (200) onTuesday and Friday. I have been doing this for 2 weeks and feel "odd" on the double-dose days and then very tired on the 100 dose days. I have made an appointment with an endocrinologist, but need to wait over 1 month for an appointment! I am worried about the double-dosing 2 days/week. I am not sure why my dose wasn't increased to 112 everyday... Thoughts?