As far as discovering IF you are hypothyroid- my advice is to be your own advocate. Do research and read about symptoms that may apply. Then, get consults from a couple different endocrinologists if you feel comfortable, and get all the levels checked. I have been on synthroid for about 7 years now, and it only came from me insisting that I get it checked- I was working out HARD 6 days a week, and not losing weight as expected. I also had a cyst on my thyroid causing me to have a visual lump in the throat (THAT was attractive...). I was so "hungry" for results on the scale and working out so frequently, I doubled my dose on my own. :nervous <V:p</V:p DO NOT DO THAT! I had been taking twice the normal dosage for almost 2 months when the insurance denied filling the prescription (they only allow you to fill it when you are below a 75% per month). The Dr. was then notified, and I got a stern talk. My Dr. explained that I could have done serious damage to my heart is I'd kept it up. You only get one heart, so I figured I shouldn't play around with it. :faint: That is my experience with this. Just stay on top of it, and give your body time to adjust to the dosage, as your Dr. should be testing you often to get it just right. Good Luck!