Would any of these blood test show if I’ve got an overactive thyroid? I had these test done a while ago because I’ve been having irregular periods and I’m only 25 the doctor said they was normal so didn’t do anymore and referred me to a gynaecologist which there’s a long wait for, I also had a scan which came back normal. But recently I’ve been reading about the overactive thyroid and have got a few of the symptoms (not diagnosis myself over internet) but because my blood tests came back normally does that mean I haven’t got a overactive thyroid or is there other test they do for it that they didn’t test me for?