hi I am 13 and have about two erections daily. This morning I had a overfly normal erection and tonight when I started masturbating I got an erection but not a full one and everyone I stroke it there is this slight sting on a part of my penis. Then I started looking up stuff about this and after 10 minutes I could not even get any sign of it being erected. It was just a soft and not hard at all and I could not control it and masturbation did not help. I don't know what to do