I hope you get good news at your appointment!
AFM--I never had a TSH above about 5.2. which some drs dismiss out of hand, unless it is accompanied by a very low T4. I was dismissed, a number of times, and had to battle to find a dr who would take me seriously and try to help me fix my symptoms, not just look at my lab numbers. My TSH was barely high and my T4 and T3 were low, but not super low. My T3 has been the hardest to budge, so there is definitely an issue there.
I even had my reverse T3 tested and it's high. (Though not all drs believe in/understand enough about rT3 to give it much credence--but when you are sick, you are willing to look for answers just about anywhere and this just makes sense to me...and others.) This most likely means that my body is not doing a good enough job of converting T4 into T3 & is wrongly converting more than it should into rT3 instead of T3.
I don't know if you know any of this, so sorry if I am boring you! I am feeling MUCH better these days and have a very suppressed TSH because I am on T3 meds along with T4. I take doses 3x a day (not ideal) & take 32.5 mg of naturthroid (T4 & T3) along with 80 mg of T3 only. T4 alone (as in levothyroxine) helped me some, but not enough, likely cuz my body doesn't convert it to the active T3 hormone.
It's all complicated because I have gut issues, with a systemic overgrowth of candida. And since 20% of T4 is converted to T3 in the gut, I'm sure that's not functioning properly. It's all related & I can't even be sure what caused what! I'm not back to 100%, but am certainly much improved over a few years ago. Sorry for the long post, once you get me started...
I'm very glad for you that you have a pretty easy to treat case & not much for symptoms. Pay attention to you body, though, in case things change (esp when you get pg)!