TMI Discharge

So the last two days, I've had A LOT of cm discharge. I normally only have a little bit here and there. But today, I soaked through two pairs of pants. This is not normal for me. A panty liner wasn't enough to hold it. It's slightly yellow and very thin. I have been sexually active but he has been pulling out(I know it's not 100%). Anyway, what could this mean? If it helps, I had a baby 4 months ago and haven't got my period yet. I appreciate any feedback.