Since 2012, I have experienced periodic blisters on my penis shaft, which heals over a few days without medication. I have not tested specifically for herpes but all STD tests say I m clear. In January, I treated staphylococcus aureus with prescribed antibiotics. Since December, I ve felt scrotal pains & burning sensation from thighs to knees. My wife is not pregnant after 2 years of marriage, in spite of very regular sex.