Discharge question (tmi, no picture)

I'm a little over 6 weeks postpartum and finally stopped bleeding. I'm still having a little heavier than normal discharge and most of the time it's white, every once and awhile it's light tan but it has a vinegar like smell. Anyone know if it's normal? I don't have any itching or anything, I have a doctor's appointment next Monday but I thought I'd see if anyone else had this.