I Am Taking Arrmour Thyroid For A Low Thyroid. I

I am taking arrmour thyroid for a low thyroid. I have gained over 27 pounds in just about 6 weeks. I forget things all the time. I retain fluid, even though I drink nothing but water every day. Is there anything else I should be doing right now? I exercise when I can. I broke three of my fingers on my left hand and bruided all the bones in that same time. I wear wrist splint and a sash to keep my arm in a held position. I ice the entire left hand about 5 times a day. I can do certain exercises as long as I don't use my left hand. Can you tell me what else I can do to lose weight and reduce the fluid accumulating in my body. I appreciate any information you can offer me.