I had a TSH level test ran last night, it came back 3.58. At the hospital I had it done it, the normal range is .50 to 6.00. The dr said most places use .50 to 4.00 as normal. I have been losing alot of hair when i shower, i am fatigued all the time, forget things, have drier skin than i use to, have gained about 18 lbs in 1 1/2 months and have not changed my diet. what does thos mean