My doctor doesn't treat or doesn't consider it high until 5.5.
I had a primary doc who doesn't treat till TSH reaches 6. I took myself to an endo who treats no matter what the TSH is if there are antibodies and symptoms present. You can see there is wide variation among doctors as to "when to treat".
If you have symptoms, you should find yourself a doctor who will treat you now. TSH can fluctuate up to 3 full points in a day's time, so your TSH has likely been over the upper limit for quite a while. If you have symptoms, potentially permanent damage is taking place in your body. Treating now will turn that around.