Hi there, I have been experiencing terrible heavy periods and irritability , have recently gained 50+ pounds. blood test indicates t3 at 100 ng/dL, thyroxine , free at 1.3, and TSH at .65 uIU/mL. Vitamin D at 20 ng/mL. I currently take 100 mcg sinthroid 1x a day. What can I do to get my energy back and hopefully lose weight??