before 3 days I recognized that my sperm its white jelly and is not that liquid like use to be, I have no pain no problem masturbating, the only problem is  I can't have morning sex in the beginning its perfect but after like 10 min my penis it's going down and I have no erection.. When have sex night time i'm doing good for hours..I'm working out twice a week and using protein every day..please help!