What are TRUE contractions?

So I hear you can definitely tell the difference between BH and true contractions, but I'm still curious...πŸ˜› I am 39 weeks and I've been having BH constantly now, but now it comes with (very) mild...discomfort? Almost mild cramping. I hear the more 'true' contractions you get, the more intense they will get. Is it possible these might be real contractions, but just at the very beginning of the labor process (i.e. not as intense)? 😱
(Can't you tell I'm starting to be almost desperate to feel anything that means this baby is coming?! Haha😁 I'm just being impatient.😊)