Do you think this is Herpes?

I had unprotected sex, a few days ago I noticed a painful bump on my Labia minora very close to my vagina. I uploaded a picture here:

It’s hard, and painful. 

Moderator comment:I have deleted the links to the images as they went to a site unsuitable for inclusion in the forums. Users can upload images directly to this site by using the icon at the top right of reply boxes.