Contractions only mostly at night?

I think they're contractions anyway. I get them for like 20 seconds every 15 minutes during the night starting around 1am for the last 3 nights. But then when morning comes they slow down almost completely and I only feel like maybe 1 or 2 every hour if that. I'm 39 weeks 3 days so I'm just not sure if this is real labor or false labor. I would go to the doctor but I really don't want to go and get sent home and go through all that because I know you should only go if you're in like real labor with contractions 3-5 minutes apart.