My partner has symptoms that could be attributed to thyroid issues but her blood tests appear ok. I notice that the ranges of 3 and 4 are lower end of range, but TSH is low. She has stomach issues, especially constipation, she gets a blocked ear sensation intermittently where she feels fogged, she has a low temperature and reynaulds, infertility. Her vitamin D came back as low although she supplements. Any idea what's going on? Thanks.