I am a 29 year old female. I was seeing a rheumatologist for severe joint and bone pain. She found a slightly low TSH and normal t4 t3 and free t4. She thinks I have hyperthyroid. Is that possible when I am mostly normal and just slightly low on the TSH. Also can this be the cause of my joint pain? My symptoms have been low/absent period all my life, irritability, intolerance to heat and excess sweat all my life, joint pain started after first baby 7 years ago and got progressively worse, heart palpatations comes and goes 6 mos now, unexplained weight gain, increased appetite. I also have very low Vit D levels. She said it could be post partum hyperthyroid since I just had a baby. She is 3 mos old. If that is the case then shouldn't we still investigate the joint pain? They are also checking for cealics disease/sprue. Any thoughts?