Peeing less than usual

Hello. I used to wake up and pee 3-4 times during midnight. And now i only pee once during midnight for 3days na. Would like to ask if anyone of you experienced this? Is it normal? Or it could be a sign of pre-eclampsia? I’ve searched it on google and it says, its one of the symptoms of pre-eclampsia. I’m on my 37th week. Tia for your help. ?