Don't know if this will help any, but I used to be tired and cold all the time, and also told my labwork was all normal! Then my friend gave me her leftover Prenatal Vitamins, and I noticed a huge difference in my energy levels! They just gave me so much pep and I just wanted to do things...maybe it was a lack of nutrition for me? I don't know, but maybe you should try a multivitamin or something? Thyroid problems and anemia aren't always the culprits, try the multi-vitamin and please let us know how things work out!