I was out of town until 6/10 so just now am reading this question.
An inconclusive (indeterminant) FNA is often best treated with at least a partial thyroidectomy to make a definite diagnosis. If cancer, a total is needed.
The Peroxidase antibody of 30 may suggest Hashimoto's but it depends on the normal range for the lab used.
With the low vitamin D -- ask to have celiac sprue antibodies tested.
Hope that is helpful.
Biopsies are wonderful, but they don't always tell you everything. I had follicular thyroid cancer in 2001. The FNA showed inconclusive cells as did the frozen section during surgery. Only the final pathology report could finally diagnose me. I am glad they went ahead and took the whole thing out anyway during th first surgery. That way I didn't have to do it again. I've been on synthroid ever since and have had NO problems. I know some people experience problems after removal, I never had. Good luck.
I don't know a lot about this, but I would definitly find someone who would do a biopsy first. It is a big thing to lose your thyroid gland, huge! Being on medication isn't as easy as it sounds. I had my thyroid ablated in 1997 and wish I had done more research before I had this procedure.
If I overextend myself on any given day I usually pay for it the next day and sometimes for two days. I am totally exhausted because I have used up all or most of my thyroid hormone. Sometimes it just seems that you can never get your levels quite right. Another example is my mother's experience. As children, my sister and I could always tell when she hadn't taken her thyroid because she would become very irritable.
Please have a biopsy done before you let a doctor remove your thyroid gland.
I have had a FNA done this is why we are doing the surgery...It showed a few follicular groups of cell undetermined...