Big question what does yellow whiteish mucus mean

amy • 2 kids,1 angel baby,#3 on the way married 11 years
I wiped today I seen white mucus then some time later I went pee again I seen yellow whiteish mucus only when I wipe, then I went to the bathroom some time later again I seen white yellow mucus it was sticky. I'm 3 weeks postpartum I have been having sex this month my bleeding has stopped not sure what is going on. Thank you for commenting