How do I know I’m in labor

I know it sounds stupid but how do I know my contractions are no longer BH if I’m not in the position to really time them? I work in a kitchen & I’m always running around. I definitely feel the BH but I couldn’t tell you how often it happens or how long it lasts. I know that walking doesn’t make it go away, sometimes it makes it worse and I have to stop lol. I’m 38 weeks today & I’m scheduled everyday between tomorrow and Tuesday (well yesterday and Tuesday to be exact) so I’ll be 39 weeks on my next day off. And then I’ll work the weekend I’m sure. I don’t have an ending date, I’m just on the schedule until further notice. I work a lot, and I have a feeling I’ll be leaving work to go to the hospital. I just don’t know what to expect or how to know it’s time 😅 SOS

Edit: this isn’t my first kid, I know they hurt. But they fucking hurt now too, and I need to see it coming soon enough to be able to drive to the hospital. This is my first time going into labor naturally