Man I wish I knew what to suggest. Test as you know is usually the cure for a low sex drive. Are you sure you have good gear? Other than that I don't know unless it's an unrelated problem that's come up. Are you diabetic for instance or any other problem that could have brought it on? I'm just grasping at straws now..
There are in fact, two things: science, and opinion; the former begets knowledge, the latter ignorance. -Hippocrates of Cos
"New opinions are always suspected, and usually opposed, without any other reason but because they are not already common." —John Locke
"And you shall know the truth, and the truth shall make you free.” - Jesus Christ