Re: So disappointed
Don't worry, this is perfectly normal. It was the same for me, I started taking my medication and almost instantly felt better, then I felt bad again. Increased my dosage and felt better again.
You can expect to have to increase your dosage gradually like this, depending on how your thyroid is being destroyed.
Another possibility is that your adrenals aren't functioning properly. But I don't know much about this.
I haven't tried licorice myself, but I know of others that have, and they say it makes a difference.
I don't know anything about your freezing hands.