Levels normal but still feel fatigue

I got labs done on my own on 6/23 because I haven’t been feeling great and these are the results. TSH: 0.78 T3: 3.0 pg/mL Free thyroxine (T4): 1.59 ng/dL I take 100mcg of Levo.

They are almost exactly the same numbers as my last check-up in December when I felt fine. I’ve felt fatigue/tiredness and anxiety the past month and a half or so (although sometimes I think I’m anxious because I feel fatigue and idk why). Could it be my thyroid or something else? Could these levels suddenly not be optimal for me anymore? Idk if it would be pointless to go see my dr with these normal levels. Any advice is appreciated!