Yellow discharge

Tia

Today I'm 9 weeks PP and I'm also exclusively breastfeeding. My PP bleeding stopped at 4 weeks and by week 5 I got a regular period for a week. (I always get periods while exclusively nursing) today I felt a HUGE gush going down my leg and thought I was getting my period again. Ut it was a bunch of yellow discharge. This keeps happening today . I'm waiting to get in with my doctor but am wondering what this could be and if any other mothers experienced this. This was my third c section and I also got my tubes tied . Not sure if that info helps. Thanks in advance!