Hey Youngster - thanks for coming back with the updates, It's good to hear how you're doing. I had an overactive thyroid diagnosis when I was first diagnosed with anxiety as well - and it corrected itself. An overactive thyroid can be confused with anxiety sometimes too as it can increase your heartrate and some other similar symptoms.
Medication doesn't work for everyone, as long as you keep doing whatever you do in consultation with the doc & your parents you'll be right. Sounds like you have a good head on your shoulders and you're thinking everything through Good luck with the psych & coping strategies, that really sounds like it's something that might work for you.