PID or what??

I gave birth 4 weeks ago and the past week I’ve started having pressure in my vagina when I sit down, and then 3 days ago I started having stabbing pain in my pelvic area, from about my belly button down to my vagina and between both hip bones, and it comes and goes, like it always hurts but it’ll get a really intense stabbing pain suddenly. I’ve also had increased discharge, to the point of it going through my underwear and pants and it smells kind of bad.... I’m going to call Tuesday and try to get in. But does it sound like an infection or just like normal pp stuff?