does any other mommys feel like when they walk (not all the time but sometimes) there little ones…

does any other mommys feel like when they walk (not all the time but sometimes) there little ones head is literally in there vagina...like not above it but down like if you walk the wrong way they will fall out lol I know he won't but still..I'm 31 weeks and it's not everytime I walk but at random times..it's happened twice today and it kinda hurt....please comment if you have felt this...and when you started feeling it...