[thedoc (OP)]

PR asked the Naked Scientists:
   
Hi, i have a problem, i dont know what it is..

I am 28 years old man, few days ago (around a week) I had a sex with my girlfriend and is not a first time for both of us.  We used to had sex from 2 years ago.  That day while we were doing sex, at the time when my sperm was ready to be out I got a type of stroke/pain on the back of my head. The pain lasts for few minutes then it was like normal.

Again, yesterday when we were doing sex same thing happened (a types of pain in my back of head) this tiime, the pain lasts for long time.

Can you please suggest me what happened.

Looking for a reply ASAP.

Have a good day.

What do you think?