My symptoms are dizziness as if I am buzzing, my chest and upper body feel like they are vibrating. I go from boiling hot in the face with freezing cold hands to hot all over. My skin is really dry and flaky, my nails are brittle and grooved. My heart races and I am being checked for AF but the A&E Doctor said it could be thyroid, this has been said before but when tested the test is either borderline or normal. I also struggle to lose weight and my lower legs are a bit puffy by the ankle. My thyroid area feel slightly swollen, but it is buzzing and dizziness that is scary, I also have lots of headaches. Any thoughts please.