Is it labor time soon?!

I’ve been having non painful contractions literally ALL DAY now! It’s 10:30 at night and they started around 12 noon. They are very slowly becoming closer together, still only about 20-15 minutes apart though. And like I said it’s not painful just tightening of the stomach. Has this ever happened to anyone else before? Do you guys think I’ll be heading into labor by tonight or tomorrow morning?! Btw I’ve lost my mucus plug a few days last week and yesterday a huge chunk came out and my discharge today has been very thick compared to how it usually is.