Hello

My boyfriend and I have been together for about 6months now. Sex is usually not a problem. For some reason today I have been experiencing excessive drying and pain around the outside of the opening of my vagina. Because this has never happened before, my boyfriend seems to not understand. In the past when this has happened with my ex (who I was in a 4yr relationship with) he seemed to be more understanding. How do I convey what is going on to my boyfriend in a manner that is understanding?