Hashimotos Hypothyroidism. & treatment.

I suffer from Hypothyroid (Hashimotos), Hypertension and Type-2 diabetes. As per lab reports in July end, My current TSH Level is high at 6.16 uIU/ml and antibodies at >600 IU/ml. Total T3 is 100 ng/dl, Total T4 is 11.4 ug/dl, Free T3 is 2.6 pg/ml and Free T4 is 1.32 ng/dl. My current dose of Eltroxin is 137.5 mcg daily on empty stomach. Actually, my TSH level went high 3 months back (9.3 uIU/ml) so my dose was increased from 100 mcg to 125 mcg daily and after checking after 6 weeks of increasing dose was found to be 6.16 uIU/ml) so was further increased to 137.5 mcg daily. Take 100mcg selenium supplement (cobadex czs) daily for reducing antibodies. I have severe Vit. D, Vit. B12 and Iron deficiency found about 8 months ago but still not corrected and have been taking supplements for that. I checked my ferritin levels last month which is 88 ng/ml. Iron is at 55 ug/ml (checked 3 months ago) even after taking supplements for 3-4 months. I request u to give me advise on diet & treatment.