Thanks for the query.
That could be due to any small abrasion during intercourse.
You can try analgesic
jellies like xylocaine
, KY gel, candid
Possibly the pain will subside with this.
You can take sitz bath which can help to some extent.
If the pain persists still consult gynecologist once.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429