im 16 and was diagnosed during Christmas. I have an amazing immune system and it was the first time visiting the gp since i was 8. Anyway, I apparently have hypothyroidism but when i was tested, it took levo and had normal levels. I dont know what kind of thyroid issue i have, nor teh results, but i never showed any symptoms at all for hypothyroidism. Im very sporty and active, and never tired. I only had a blood test, because he was worried i had low iron levels.