Synthroid Feelings of Dread, Thyroid Levels, Generic Brand, Hypothyroidism, Panic Attacks

I am extremely sensitive to medications. That being said, even though my thyroid levels were normal, my doctor believed I had hypothyroidism. He put me on .25 mcg of the generic brand of synthroid. I could only take it for 5 days because during that time I developed feelings of "dread" and I was afraid to go to sleep at night. When I stopped the pills, I started to feel better but I believe the stuff was still in my system. Some stressful things happened right after, and it threw me into panic attacks with scary, racing thoughts, trembling, insomnia, etc. I'm slowly getting better. But after reading this, I feel even better now knowing that I'm not losing it and chances are great that it's the synthroid that's causing it.