For the past several months I have been experiencing symptoms of tachycardia- resting heart rate of 150's, constant sweating, insomnia, increase body temp,hand tremors, brittle nail/hair and headaches. I also have hypothyroid symptoms such as constipation, sluggish, forgetfulness, inability to concentrate and I have also gained 25 pounds in 2 months (not due to increase in intake), I also work out everyday and have a personal trainer. I had postpartum thryroiditis 3 years ago which I was told would resolve but I don't think ever really went away. I have had a fast heart rate > 100 since then. I had my labs done 3 weeks ago and they were: TSH<0.02; T4 2 (0.9-1.8) and T3 4.6 (2.3-4.2). I had my labs redone a couple days ago and my TSH is now <0.015 and T3 and T4 are WNL. I've had 2 normal thyroid ultrasounds in the past 3 years. My endo has no clue what is going on and I have read everything I can read both online and books. I work in the medical field (have a master's in nursing, working on DNP) no one seems to know what is going on with me or how to fix it. I am waiting on the TSI, thats the only antibody my endo ordered. I also have a history of SLE, only involving my joints. Any help would be greatly appreciated!