I have been on 2 grains of nature thyroid but have trouble sleeping and distended abdomen. If I go up to 2 1/4,grain I get ringing in my head and ears. So I started on 2 grains of Armour and want to know how long before it will get in my system. I'm on my 4th day and am sleeping better, but very tired, but my digestive tract seems to be moving better, ringing is off and on. Is 2grain Armour the same as 2 grain Nature Throid?