Labor

I had kids so long ago and I just feel I’m not going to know when I’m in labor, my 1st was back pain and I really didn’t know but my mom said just go get checked out and boom i was in active labor, my second was premie and my ob told me @ my reg appt I was on labor, and my last I woke up and felt as his head was coming out when I went to the bathroom got to hospital and literally had him downstairs! I am in so much pain now consistently and cramps all the time (3rd trimester) and am terrified of just not knowing 😕