I’ve had this the past 2 night , VERY painful contractions that felt exactly the same as when I was in labor last time and anywhere from 3 to 8 minutes apart for about 4 hours and then they taper off, I go to sleep and by morning things are normal again, it’s super frustrating! Bad news is I had this happen last time for 4 or 5 night before I gave birth , good news is your body is probably doing something and it’s gonna be soon!