Should I Be Concerned?

I'm 32 weeks with my second child. I never had BH with my first and I was induced on his due date because of gestational diabetes. I don't have diabetes this time and I've been having increasingly intense BH usually at night. It feels like period cramps and last 30-40 seconds. I've never had more than 5 in an hour and they're always inconsistent so I know it's not prelabor. They always happen at night though. Does that make a difference? I'm starting to question if they're even BH because they only happen between 9pm and midnight and it's only lower cramping like where period cramps would be. My next Dr appointment is on Thursday but I'm wondering if I should be more concerned than I am..?