What are some signs of labor nearing ?

I’ve never really experienced actual labor happening on its own as my first I was induced and don’t really remember the contractions that I did get before I got an epidural etc but my first ended up in an Emergency C Section, my 2nd was a planned C Section and now my 3rd is also planned for March 4th. But today I’ve been having pain in my pelvic/bladder area when I stand/walk. I don’t remember having any of this with my other 2 babies.