Intense period-like cramps

For the past three-four days, I’ve been getting dull achy cramps similar to the first day of my period. I was deep cleaning like crazy last week and had to rest because I was hurting so bad. I tried vacuuming and mopping today and I’m having to take breaks because the cramping gets so bad. This is my third babe, and I don’t recall ever getting such bad cramping pain, even in labor I didn’t have pain like this until I was close to 7-8 cm. I can’t say they’re contractions because I don’t notice tightening associated with it, it’s just pain. Anyone else going through this? I’m 35 weeks 3 days.

Update* - I told my dr at my appointment today and she said baby was really low and it’s likely just her hitting a bunch of nerves.