I am having my first postpartum period at 18 months postpartum. I had it at 17 months postpartum with DD1, and while I remember it being heavy (very heavy) I don't remember being in so much pain. I sit down and gasp. It feels like my insides are shifting when I sit, and it's quite uncomfortable. Walking up and down the stairs is painful; if feels like things are shifting and about to fall out. Cramps are better now that I'm on day 3, but the feeling that's left is very odd. Thanks.