How do you know you were going in labor

Or maybe you didn’t know 🤣 I’m a ftm. I know each and pregnancy is different and people have different experiences, so I would like for y’all to share some! Did your water break or not? Happen suddenly? I’m just a little nervous I’m 32 weeks and have been having ALOT of lightning crotch and last appointment I had low amniotic fluid so they want to see me back! I should know more my next app