Yeah you're right that 8.1 is a little on the low side and may indeed account fr some of the symptoms you describe. As someone else has said in a post, your endcrinologist might be keen to arrange for a free testosterone, in addition to a total testosterone, along with a couple of other useful blood tests that may help them work out how best ti improve your health - things like SHBG and FAI. It ccurred to me that you could ask someone to arrange these tests before your appointment so that you can get to the bottom of this issue quicker. Hope is all goes ok!RegardsSimon