Pain?

I’m not even completely sure how to describe where this pain is coming from...... the lower part of my uterus? Right about hip bone level, but it’s not in my hips. Anyways, I’ve been cleaning the house and doing quite a bit around the house lately, I’m about 32 weeks pregnant and now it feels like my uterus is sore?? If I’m just sitting it’s fine by if I’m walking or stretching or lifting anything this pain hits me..... it’s not a sharp pain, it’s an aching pain. I’m sure this makes no sense but I’m trying to see if anyone else has maybe felt this? Is it just from doing too much this late into the pregnancy? I’m hoping this makes sense to someone lol.