Suggest Treatment For Burning Sensation In Penis After Intercourse

I am a 28 yrs married by. My prblem is somewhat differentI think. My wife has just deliverd a baby girl 3 months ago and has als set a copper tube for further delay. My roblem is that last time when we had intercourse (after 7 months) at that time I felt an EXTREME fire on my penis when it got stuff and als after having sex I was feeling that fire kind of feeling for two days. The hair around my penis also became white which I noticed next day.

But now it is fine.

But I am very much scared shouldn't it hapen again

Kindlyt let me know the reasn and a remedy as well as