katiepoopops, positive thyroid peroxidase antibodies means you have autoimmune thyroid disease (Hashimoto's). Antibodies are mildly elevated and you may be able to reduce them and prevent progression by adopting a 100% gluten-free diet. I doubt your GP will take much notice other than telling you most people have antibodies. Most doctors don't treat Hashimoto's. They treat the resulting hypothyroidism when TSH is > 5 or 6 in the presence of antibodies.
TSH 2.44 and FT4 under half way through range suggests your thyroid is already starting to struggle.
Ferritin, vitD and folate looked good in 2014. It may be worth retesting them and B12 in a few months.
Thanks Clutter, is that all I can really do at the moment, then? Go gluten-free? Will that help with my symptoms like hair loss, fatigue, brain fog etc?
Katie, it won't restore lost thyroid function but it may reduce attacks and further damage to the thyroid gland. You're unlikely to get NHS treatment until TSH is over range. If the symptoms are intolerable you might consider self medicating but that will prevent you eventually getting a diagnosis and NHS treatment.
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