Early labor?

Since yesterday I've been having contractions, they were consistent But then stopped .. Now they've been back since early this morning, I couldn't even sleep last night & woke up every two hours. A week ago & a few days, I was having contractions too that landed me in L&D, they were regular but I was dialating & they were stopped with meds.... However the ones that I've been feeling now are more painful & I get period like cramps and a back ache along with them! And a bunch of pressure.. Not to mention all the diarrhea as well, am I in early labor? & should I go & be checked? I have a doctors appt. tmmrw so I'm gunna wait it out again .. I'm so worried