I recently have been going through some weird symptoms that my doctors are being very thorough about. I have had severe heart palpatations, my resting heart rate jumps to over 140, I have tingling in my arms and hands and feet and face, my hands and feet are ice cold and sweaty. I feel like i am either having a heart attack or a panic attack... I am a 35 yr old female and my mom had a goiter that was removed in her 20's and my father had hypothyroid. Upon having one of these episodes, my husband took me to the ER.. They ran some blood work.. The doc added a throid test and my TSH was 2.9 and my T4 was .89 . I ahve been watching my thyroid over the years and was alarmed by these numbers because in Aug of 2008, my TSH was 1.01 and my T4 was 1.11. In 2005 my TSH was only .75. How could it have gone form .75 to 2.9? Now upon researching this, I discovered that most general Drs use a range scale for TSH of .05 to 5.0, but some endocrinologists use a newly revised scale of .03 to 3.0 in which case I am very close to the high range. When I mentioned it to my general Dr she just said i was still within range and discounted it totally. They have run me thru 24 hr holter monitors, stress tests, ekg, and echo tests. I soon will go for a Ct scan of my brain. Has anyone heard of this new revised range, and any advice would be greatly appreciated as far as my numbers go. Sometimes I feel real racey, sometimes i feel so sluggish I can hardly move. Is it hoshimotos, or hypothyroidism?