I have been on Armour for several years (90 mg most recent) and apx 2 months ago switched to Nature Throid 81.25 only because of cost. Having symptoms like heart palpitations, trouble sleeping, irritability, depression. Am I just better on Armour or could it be a dosage adjustment needed on the Nature Throid? I just had a blood draw but cant see doc for 2 weeks. Need a refill TODAY and leaning toward filling the Armour. Any advice appreciated!