You're on your way. It's rougher for some than others so this is probably just part of the process for you.

Just keep track of how you feel from day to day and see if it improves over the next few days. It should.

If you're taking Thyriod Support, stay with it. It takes a couple days for most people to feel the difference, but it's good when you do. If you don't, increase the dose little by little. It should help relieve you from the brain fog and/or fatigue and other thyroid-related issues but it's effect comes on over a period of days.

Keep us posted.