Is A Brownish, Smelly, And Painful Fluid Leaking From My Incision Post Surgery Likely An Infection?

Had a surgery on june 8th and part of my incision is leaking a brownish fluid through my shirt, smells bad, and is painful. Is this an infection? My surgeon s office doesn t open until Monday. Will I be okay to wait? Please email, do not call or text. Phone Disconnected.