I have Hashimoto's. Have since Dec 97. Take Synthroid 100 mcg daily. I pick up on your frustration and fear. It will be ok. Do you have any questions? I do not know everything, but may be able to help. I hope so.
Just a quick note to say hi!
First thing is remain calm. Let the doctors look into what you have. It maybe nothing of the sorts and don't buy trouble before you need to. What ever your problem is you can handle it.
Be well and dont weigh heavily on the problem.