It's an easy blood test to get your thyroid levels checked. But a nodule does not necessarily have anything to do with it (they may have checked your levels at some point and they were "normal" so they just didn't pursue that and didn't mention to you since it was not a problem). I have a tumor in my adrenal gland that was not discovered until my appendix burst in 2003 (when I was 53) and they did 3-day urine tests, MRIs, etc. and sent me to see an endocrinologist who explained to me the symptoms I should look out for if something was going wrong with the hormones being produced but, otherwise -- oh, well, it sits there and occasionally, every few years my GP may have me have an MRI or hormone tests, etc.

I have found that correct hormone levels are kind of like vitamins, they're necessary but not magic bullets that solve all that is wrong with us. I have to take my thyroid pill daily but over time I haven't noticed that big a difference. It's like being thirsty or something and you drink that water and aren't thirsty anymore but you aren't anything else either, you just forget what feeling so thirsty feels like, just that you don't want that again. I don't think most of our symptoms come from just one cause. I'm still tired sometimes now, but suspect it is meds, sleep quality, etc., there's too many other factors that make up the whole.