My issue was hip pain...and to this day I still find myself waking up in horrible pain, where my hips feel locked or like they're being squished unmercifully.
I had knee and foot pain after baby 4, because of (I believe) excess water weight. My feet were like watermelons and I felt like I was retaining the Nile in my legs. My arches actually fell during that pregnancy...it was excruciating.
Joint pain from pregnancy is usually due to the way we carry ourselves and the support we give our arches during pregnancy. Most of us have a tendency to walk like a chicken...butt out, bello out, rounded shoulders, and to retain water and not wear properly supportive shoes because sandals give more freedom of movement.
Good luck, Mama. It will get better.
(FWIW, I also have shoulder joint pain from years of sleeping with my arm curled around the top of a baby's head while it nurses, and of slinging 5 babies for a total of 14 years). WHooft.