Mommies, as you understood, what do you think about your contractions?…

Mommies, as you understood, what do you think about your contractions? Or how to understand that it's training? For several days, I get hot flashes, then I feel like pulling down and there's a pain in my lower abdomen and the baby is actively protruding inside and freezes like a stone and drops. I had an ultrasound recently, everything was good ? The appointment is only on the 31st. Although I watched many videos about childbirth, I'm afraid I might miss the stage of contractions.