First time mommy and possible TMI

Ok so I am 31 weeks pregnant and I have had a few Braxton hicks contractions last month. But all day today I have felt like a cramping feeling nothing like Braxton hicks but more like iv got to go potty 💩💩💩 that being said I have had the diarrhea all day..... iv read this is a early sign of labor??? My back hurts all the time so can't go by that as much. (I know it'll be way worse come time) Just curious if anyone has had this experience an it actually be early labor? Iv not lost my mucus plug yet. Thanks in advance. 😬