when i was pregnant, something weird would happen to the ligaments in my hips. woke up one morning, got out of bed and fell right on the floor - couldnt walk. it passed after several minutes. but i had to sleep weird to stop it so i ended up sleeping on my couch.
i still sleep on my couch. my bed is too uncomfortable. also if i sit a certain way my ligaments still get messed up and i can barely walk.
i read somewhere in a pregnancy book the ligaments relax in the pelvic region to make it easier for the baby to pass... i dunno but its extremely painful and scary.