When to call the doctor?

Kiah • Wife and Momma. Sept 17’💗, June 20’ Autism and Auto inflammatory momma🧩🧡

I had my 38 week check today and they said everything looked good. But all week I have been having contractions on and off and they are like period cramps on steroids plus back pain. And now tonight I have been having severe diarrhea when this whole pregnancy I have been border line constipated. The contractions are not consistent enough alone to send me to the hospital but with the diarrhea too should I call? I'm not sure..