I hit my penis on a sharp corner of a table and i had some pain but only a while. After that i don t feel my penis is normal. it feels numb, it doesn t erect. I m worried if i had injured some nerves. My doctor advised me vitamin B. Painkillers and swelling medicines if pain reoccurs. so far i can urinate normally and there is no pain. Urine tested fine too. Should i be worried?