Hello, and I am pleased to help, use of my answers are for educational purposes only.
This could be irritation from sex itself, but this could also be a yeast infection or yes, even a herpes out breakout.
This does not really sound concerning - and you could try an over the counter product such as Monistat or Vagistat to see if this helps, and if NOT, then make an appointment to see your ob/gyn.
It could be due to a herpes outbreak -
But, bleeding from this area is NOT usually due to a herpes - but more like a yeast infection.
I hope this helps....
This is UNLIKELY to be chanchorid /LGV - this is very unlikely in Industrialized countries as we do not see these types of infections that often in countries such as the UK, Australia, US, France, etc....