Signs labor is near?

Third baby (I know I should know by now labor signs but I’ve only went into labor naturally once) I feel different. My whole back is sore, I’m nauseous and feel bloated, baby dropped, and I’m having some lightning crotch. Hospital is 30 minutes away but I don’t wanna go if it’s nothing. I was already 2cm and 50% effaced Thursday. I’m not really having contractions though