PP with thyroid testing, what comes back as normal is normal for some but not for others by way of symptoms. In effect you could have a thyroid condition but it not show outside of the range, even my sisters doctor couldn't believe it for her when it happened, but happen it did and she is definitely hypothyroid swinging from hypo to hyper on occasions. You definitely need all the tests as sqad says to say one way or another. Have you tried taking your temperature early mornings as a low temperature can be an indication of hypothyroidism?