But i feel my free testosterone levels 10pg/ml are very low far from normal levels (2%of serum testosterone in this case 8 ng/dl =80pg/ml).do you have an opinion on this?

Testosterone: deficiency shows up in growing age with signs of not growing hair, small libido otherwise in adulthood testing is not necessary. testosterone inj. or ointments don't help except the seller. Mine differences are not a clinical condition.Avoid caffeine, drinking, TV in room. Do regular exercise and get busy with ur studies or work. Don’t dx yourself.