36 weeks with cramping more at night

I was wondering if it is normal to experience more of what feelings like menstrual-like cramps at night. I feel more of them at night than during the day. They space way out in the day times. They are enough to keep me awake or wake me at times, and last throughout the night, but by the daytime, I’m fine. I do drink plenty of water during the day and when I wake during the night. I don’t know if it’s just all apart of the process or if I should be concerned.