What Causes Whitish Vaginal Discharge?

I noticed that after losing my virginity I have had an increase in vaginal lubrication/discharge even when I was not engaging in sexual activity. In addition, ever since, i have been more lubricated and aroused during sexual activity (intercourse and non-intercourse). The discharge i am experiencing is normal in color (whitish clear) however, is more fluid-like, and less thick than it was prior to having sex. I am wondering if this is normal or if i should be concerned about the change of my vaginal fluids. I am twenty years old and started having intercourse, with a condom, about 3 weeks ago and have never taken any kind of hormone altering medications or birth control, nor am I currently taking any kind of medication.