Susan, your dose should be adjusted based off of your FT3 and FT4 levels, not your TSH. TSH lags about 6 weeks behind dosage adjustments. Also, being in a "normal" range is all relavant - let your body be your guide and fight for it. I'm hyperthyroid so I'm comfortable at the tops of the ranges. Most likely being hypothyroid, you will be most comfortable at the low end of the range.

I keep a spreadsheet and graph with dosage amounts on them. I've been off meds for a year and remain stable, but I had to fight for medicine to control it. Most patients are noncompliant with their meds so you need to stay on top of it and prove that you're taking them when you're supposed to and how your body reacts to it. A good endo is hard to find so you are your best advocate.

Take care and good luck!