Pain 4 months after labour?

About 3 months after having my bub ( it’s now been 4) I’ve been having cramping regularly and pain in my pubic bone. Wake up some mornings aching and sometimes I can feel it when I’m walking. There’s like a gap in the middle of my pubic bone is that supposed to be back together by now or? Just thoughts and opinions on it? I’m heading to doctors tomorrow arvo. I’m breastfeeding, my first two periods were normal but my recent one wasn’t and it started just before my last period