Did anyone’s labor start as just feeling like you need to poop?

Maybe tmi lol. But I keep feeling like I need to poop but I can’t. Like there’s none actually in my body but I have the urge. And then I remembered when I had my first ever period and swore I needed to poop only to realize later it was period cramps. So then it hit me- oh my god is labor starting?? Is this how labor can start?? Did anyone think they were just constipated but it turned out to be labor?