That's great you have been able to lose some weight. When my doctor told me about my thyroid, she said my numbers are just below where they start medicating. Even though I am experiencing some symptoms, she does not want to start me on medication until or unless it gets worse. Since the medication has to be taken every day for life, she wants to wait and monitor my hormone levels.
You are lucky that you do not have to take medication for it. I have to take medicine now for it for the rest of my life