Bleeding. Please help!

TTC and have been tracking with clear blue OPK. I am on CD 15 have gotten 6 days of peak fertility. I had a small amount of brown discharge yesterday but starting bleeding today enough to put a tampon in. No pain/no cramps and no clotting... just red blood.

My Gyno is closed until Monday. What should I do? What do you ladies think it is? Can I really have gotten my period 2 weeks already or is it something else?