I've had verious problems with gaining weight over the last year, particularly when upping my exercise. I have a private nutritionist who advised I should get my throid checked. The NHS have done the standard TSH test and my level is 2.9. They tested for other bits as well (no T4 or T4) and have prescribed folic acid and my B12 is also low but according to them there are no problems with my thyroid. I know some people a TSH level of a lot higher but according to my nutritionist there still may be an issue and if I had this level a few years ago they would be treating me. I have private medical insurance. How likely is it that if I asked my doctor they'd write a referral letter to have more tests privately?