How Long Does Low Dosage Of Synthyroid Take To Change The TSH Levels?

I have been on 0.112 and0.100mcg of syntroid. The doctor says my tsh levels are 1.01 and wants to lower my synthroid to 0.88 mcg synthroid. I have not thyroid and has never been lowered that low. If I start taking the.88 how long will it change my tsh levels and should I ask the doctor for more frequent testimgs because I had a motorcycle wreck that crushed the front of my forehead and sinus cavities. I have had 14 open brain surgeorys and 5 cranioplastys to this date. I scares me to lower so much during this very painful and traumatic part of my life