Can barely walk 39Weeks

I've been getting lots of period type cramps oplver the passed couple days and back aches, midwife told me 2 weeks ago that the babies head is engaged but I haven't had any cervical checks at all in the whole pregnancy so I don't know if anything is happening there.

Today I was feeling a weird sort of pain with his movements, after googling I found that his hitting my pelvic girdle, it's like he was tapping/hitting the bones, wasn't too painful, after that feeling I stood up and had sooooo much pressure in my whole pelvic area that I can barely walk, I can stand but any step sends a shock/stabbing sort of pain, what helps is keeping my legs as far apart as possible and walking slowly, I still feel it but not as much, just have more pressure on my bladder that way though 😅

Sitting down I have very mild cramping front and back and feel the weight in my pelvis, but I have no contractions, braxton hicks or anything.

I'm exactly 39 weeks tomorrow. Could this even be a sign of baby coming or just how the baby is lying?