How To Treat Vaginal Dryness During Intercourse?

Hi i am a woman 34 years old, diagnosed a year ago with Herpes 2. as of lately my vagina has not been providing lubrication, even though i am aroused by my husband and my vagina feels aroused but when we try to have sex i am barely lubricated. Even with enough lubrication to penetrate, i then get dry. Even my orgasms aren't heavily lubricated like before.What could be the problem and how do i lubricate my vagina?