Pink discharge help please?

hi im on cycle day 22 coming up to my third period post miscarriage that was natural at 8 weeks , my cycle out of whack, so i.dont know when i ovulated , my first period was 6 weeks after miscarriage and second one was 6 weeks after first im on.cycle day 23 and yesturday when i wiped i got light pink discharge that was it so today it happened again just the once light pink discharge i have no infection etc i had sex with my partner twice since my period ended but he didnt ejaculate in me is it possible to.still get pregnant if he didnt ejaculate from precum and what is the pink discharge keep googling it but coming up implantation