Hello, I'm currently about 32 weeks pregnant, my second pregnancy. For…

Hello, I'm currently about 32 weeks pregnant, my second pregnancy. For two days now, at night, my belly has been pulling, training contractions. Today is the third day, since yesterday evening and this morning it pulls with pain as if during menstruation. The belly seems to have dropped down. Do I understand correctly that this is a sign of labor? I went for an ultrasound a few days ago, a 3rd trimester scan, everything seems normal. If anyone had this before, how long did you wait until actual childbirth? And they say that with the second one, everything goes faster, is that true for you too?)