Hi girls
The problem you are having with your collapsing pelvis is caused by a hormone called relaxin. This hormone causes all your ligaments and joints to stretch and loosen ready for birth. The bulging sensation is caused by your baby pressing down. It could also be cause by engorgement. Sometime things down there start to swell due to the increase blood supply. Be careful when lifting anything heavy. Try to avoid quick movements, especially turning over in bed, this can cause a very nasty stabbing pain in your pubic bone