welcome to Health care magic.
1.Your question is but unclear, what i understood was, had unprotected sex and you are having sensitivity in your penile gland area?
2.Do you have nay discharge (like white pus or similar) or just sensitivity?
3.IF the symptoms are immediately after the sex, then give some time at least 2 days, the symptoms may ease off on its own.
4.If you been having them for some time with redness
/ pain / sensitivity / discharge, one can think of some STD
( sexually transmitted disease
5.However you need to get an appointment with your GP or Urologist
. So that one can examine and do needful things.
Hope it helps you. Wish you a good health.
Anything to ask ? do not hesitate. Thank you.