Sign of labor being near?

Kellie • First time mommy to a babygirl named Lillie ☺️💕

This is probably stupid to ask but since I’m a FTM I’m not too sure... I’m 39 weeks pregnant and for the past 3 days I’ve been having severe nausea and off and on diarrhea. It feels like I have some minor cramping but I’m not sure if that’s labor pains or upset stomach... has anyone had these symptoms before going into labor or could it be something else?