I think Stephanie in the Yahoo group would tell you that for Hashi's you do need the meds (in addition to Iodine and selenium, which are critical, and companion supps). Have you asked her?
I don't remember whether you said what meds you had tried. I found out this summer I had Hashi's and don't think I've been on near high enough dosage of thyroid meds. I upped from one grain to two grains and switched to Naturethroid. The increase in dose has helped some, and I will be increasing to three grains as soon as supplies start moving again.
I will be interested to see if my antibody levels have gone down, but that will be a few months away.